MariaDB is a fork of MySQL, created and maintained by the original MySQL developers. MariaDB is intended to remain free and is published under GPLv2. It is very similar to MySQL, meaning that most MySQL examples you find online will also work on MariaDB
Official website: https://mariadb.org/about/
MariaDB can be installed using
sudo apt install mariadb-server
To set root password, you can use:
phpMyAdmin can be used to manage MariaDB.