子オブジェクトに対応したtextを表示したい

前提・実現したいこと

＜前提＞
Unityで生成したオブジェクトの名前に応じてtextを切り替える機構を作っている。

訂正前のコードでname1,2,3...10に対応した文字が出力されていたが、一度出力された文字が二度は出力されないという不具合の修正方法を探していたところGameObject.Findが原因であることがわかり、同じオブジェクトを参照するためにはGameObject.FindGameObjectsWithTagを使うとよいとさていたため訂正後に書き換えた。
しかし、訂正後のコードで構文エラーを起こした。

＜質問＞

・正しい訂正方法はどのようにすればよいのか。

発生している問題・エラーメッセージ

訂正前：一度出力された文字が二度は出力されない
訂正後：以下のエラーメッセージが出て、進行不可になっている
エラー	CS0029	型 'UnityEngine.GameObject' を 'UnityEngine.GameObject[]' に暗黙的に変換できません

該当のソースコード

//訂正前--------------------------------------------------------------------------------------------
public class gamecontroller : MonoBehaviour
    {
       
        public Text handpoint;
        public GameObject[] cardPrefab;
        private int number;
        public Transform playerHand;
        bool isCalledOncedrow = false;
        string name1;
        string name2;
        string name3;
        string name4;
        string name5;
        string name6;
        string name7;
        string name8;
        string name9;
        string name10;
        void Start()
        {
            number = Random.Range(0, cardPrefab.Length);
            Instantiate(cardPrefab[number], playerHand);
          
        }
　　　　void Update()
        {
            int handCount = playerHand.transform.childCount;

              handpoint.text = $"{name1}{name2}{name3}{name4}{name5}{name6}{name7}{name8}{name9}{name10}";


            if (handCount < 10)
            {
                if (!isCalledOncedrow)
                {
                    if (Input.GetKeyDown(KeyCode.C))
                    {
                        drowing();
                    }
                }
            }
           if (handCount >= 1)
            {
                GameObject child1 = playerHand.transform.GetChild(0).gameObject;

                if (child1 == GameObject.Find("card (+)(Clone)")) { name1 = "+"; }
                if (child1 == GameObject.Find("card (-) (Clone)")) { name1 = "-"; }
                if (child1 == GameObject.Find("card (×)(Clone)")) { name1 = "×"; }
                if (child1 == GameObject.Find("card (÷)(Clone)")) { name1 = "÷"; }
                if (child1 == GameObject.Find("card (1)(Clone)")) { name1 = "1"; }
                if (child1 == GameObject.Find("card (2)(Clone)")) { name1 = "2"; }
                if (child1 == GameObject.Find("card (3)(Clone)")) { name1 = "3"; }
                if (child1 == GameObject.Find("card (4)(Clone)")) { name1 = "4"; }
                if (child1 == GameObject.Find("card (5)(Clone)")) { name1 = "5"; }
                if (child1 == GameObject.Find("card (6)(Clone)")) { name1 = "6"; }
                if (child1 == GameObject.Find("card (7)(Clone)")) { name1 = "7"; }
                if (child1 == GameObject.Find("card (8)(Clone)")) { name1 = "8"; }
                if (child1 == GameObject.Find("card (9)(Clone)")) { name1 = "9"; }
                if (child1 == GameObject.Find("card (0)(Clone)")) { name1 = "0"; }
            }
           //child2~child10は文字数オーバーのため割愛
        }

        void drowing()
        {
            isCalledOncedrow = true;
            number = Random.Range(0, cardPrefab.Length);
            Instantiate(cardPrefab[number], playerHand);
        }
//訂正後--------------------------------------------------------------------------------------------
public class gamecontroller : MonoBehaviour
    {
       
        public Text handpoint;
        public GameObject[] cardPrefab;
        private int number;
        public Transform playerHand;
        bool isCalledOncedrow = false;
        string name1;
        string name2;
        string name3;
        string name4;
        string name5;
        string name6;
        string name7;
        string name8;
        string name9;
        string name10;

        GameObject[] child1;
        GameObject[] child2;
        GameObject[] child3;
        GameObject[] child4;
        GameObject[] child5;
        GameObject[] child6;
        GameObject[] child7;
        GameObject[] child8;
        GameObject[] child9;
        GameObject[] child10;
        private string answerTag1 = "card.1";
        private string answerTag2 = "card.2";
        private string answerTag3 = "card.3";
        private string answerTag4 = "card.4";
        private string answerTag5 = "card.5";
        private string answerTag6 = "card.6";
        private string answerTag7 = "card.7";
        private string answerTag8 = "card.8";
        private string answerTag9 = "card.9";
        private string answerTag10 = "card.10";
        private string answerTagplus = "card.plus";
        private string answerTagminus = "card.minus";
        private string answerTagcloss = "card.closs";
        private string answerTagslash = "card.slash";
        void Start()
        {
            number = Random.Range(0, cardPrefab.Length);
            Instantiate(cardPrefab[number], playerHand);
          
        }

         void Update()
        {
            int handCount = playerHand.transform.childCount;

              handpoint.text = $"{name1}{name2}{name3}{name4}{name5}{name6}{name7}{name8}{name9}{name10}";


            if (handCount < 10)
            {
                if (!isCalledOncedrow)
                {
                    if (Input.GetKeyDown(KeyCode.C))
                    {
                        drowing();
                    }
                }
            }
           if (handCount >= 1)
            {
                child1 = playerHand.transform.GetChild(0).gameObject;

                if (child1 == GameObject.FindGameObjectsWithTag("card.plus")) { name1 = "+"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.minus")) { name1 = "-"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.closs")) { name1 = "×"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.slash")) { name1 = "÷"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.1")) { name1 = "1"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.2")) { name1 = "2"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.3")) { name1 = "3"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.4")) { name1 = "4"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.5")) { name1 = "5"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.6")) { name1 = "6"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.7")) { name1 = "7"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.8")) { name1 = "8"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.9")) { name1 = "9"; }
                if (child1 == GameObject.FindGameObjectsWithTag("card.0")) { name1 = "0"; }
            }
           //child2~child10は文字数オーバーのため割愛
            
        }

        void drowing()
        {
            isCalledOncedrow = true;
            number = Random.Range(0, cardPrefab.Length);
            Instantiate(cardPrefab[number], playerHand);
        }