I want to do mysql than what is process to do

Answer 1

There is also an android app called Knowledify SQL that offers lessons and quizzes on SQL

Answer 2

Begin with the SQL Fundamentals.
https://www.sololearn.com/Course/SQL/?ref=app

If you understand the lesson, language and commands then you can practice the SQL commands with PHP for website development
or practice with MySQL command line in XAMPP for example

Here is some source to get started with MySQL and PHP
https://www.w3schools.com/php/php_mysql_connect.asp
https://www.w3schools.com/php/php_mysql_intro.asp