This is the first screen when the MariaDB server setup starts

Click on Next.

To continue, select that you agree.

You need a new database instance.

Click on Next

Best to leave it as it is and click Next.

Enter a password and repeat it Click on next.

Note: remember the password well,

you need it with other setups! 

Like:

RadioDi database setup

HeidiSQL database server manager.

Best to leave it as it is and click Next.

Just click on install.

Now the installation is running.

The only thing  what follows  is the finches screen.