Database php cpanel
If you can't build a database you may have trouble building a shop.
If you are using php & have cpanel, log into cpanel, click on the mysql database button then create a new database by giving it a name. Then add a user by giving a name & all rights or privileges if it's you that's accessing it. Once done in cpanel use "php my admin" button to add tables etc. Remember to have an integer ID column that is the primary key that auto increments. Its all in there just read & practice.
Good luck - Chris