mysql2インストール失敗

前提・実現したいこと

Win10　GEMを利用しmysql2インストール中以下のエラーが発生ました。
大変困ってます。初めて学ぶプログラミングで関連する知識もなくネットで対策を読んでもよく理解できません。

発生している問題・エラーメッセージ

エラーメッセージ

Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.

Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=C:/Ruby30/bin/$(RUBY_BASE_NAME)
--with-mysql-dir
--without-mysql-dir
--with-mysql-include
--without-mysql-include=${mysql-dir}/include
--with-mysql-lib
--without-mysql-lib=${mysql-dir}/lib
--with-mysql-config
--without-mysql-config
--with-mysqlclient-dir
--without-mysqlclient-dir
--with-mysqlclient-include
--without-mysqlclient-include=${mysqlclient-dir}/include
--with-mysqlclient-lib
--without-mysqlclient-lib=${mysqlclient-dir}/lib
--with-mysqlclientlib
--without-mysqlclientlib
C:/Ruby30/lib/ruby/3.0.0/mkmf.rb:1050:in block in find_library': undefined method split' for nil:NilClass (NoMethodError)
from C:/Ruby30/lib/ruby/3.0.0/mkmf.rb:1050:in collect' from C:/Ruby30/lib/ruby/3.0.0/mkmf.rb:1050:in find_library'
from extconf.rb:87:in `<main>'

To see why this extension failed to compile, please check the mkmf.log which can be found here:

C:/Ruby30/lib/ruby/gems/3.0.0/extensions/x86-mingw32/3.0.0/mysql2-0.5.3/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in C:/Ruby30/lib/ruby/gems/3.0.0/gems/mysql2-0.5.3 for inspection.
Results logged to C:/Ruby30/lib/ruby/gems/3.0.0/extensions/x86-mingw32/3.0.0/mysql2-0.5.3/gem_make.out
Fetching v-0.1.1.gem
Fetching fastthread-1.0.7.gem
Building native extensions. This could take a while...
ERROR: Error installing v:
ERROR: Failed to build gem native extension.

current directory: C:/Ruby30/lib/ruby/gems/3.0.0/gems/fastthread-1.0.7/ext/fastthread

C:/Ruby30/bin/ruby.exe -I C:/Ruby30/lib/ruby/3.0.0 -r ./siteconf20210517-5288-vnb5g0.rb extconf.rb
extconf.rb:13:in block in <main>': uninitialized constant Config (NameError) Did you mean? RbConfig from extconf.rb:12:in open'
from extconf.rb:12:in `<main>'

extconf failed, exit code 1

Gem files will remain installed in C:/Ruby30/lib/ruby/gems/3.0.0/gems/fastthread-1.0.7 for inspection.
Results logged to C:/Ruby30/lib/ruby/gems/3.0.0/extensions/x86-mingw32/3.0.0/fastthread-1.0.7/gem_make.out
ERROR: Could not find a valid gem '0.5.2' (>= 0) in any repository

C:\Users\user02>