Migrating from MyISAM to InnoDB

Dear MariaDB Experts,
After I ran mysqltunner on my MariaDB server, it suggested me to turn some tables into InnoDB:

Code:

-------- MyISAM Metrics ------
[!!] Consider migrating 47 followning tables to InnoDB

Is there a tutorial about this procedure?

 

These steps are not trivial. I had better keep my present tables unchanged.