Hi welcome to the board. I assume English isnt your first language..
In PHPMyAdmin there should be at least 1 Database called MySQL if its not there obviously something has gone wrong, you require that table for users etc.
If its there.. on the main interface you can create a database, then when you install your PHP Application just make sure you have the correct database name user,pass etc.
Most scripts come with an installer so once the database is created it should create the tables.
