[support] Beginner question.

Hello everybody, I am beginner with Drupal and I would like to create a simple CRUD (Create Read Update Delete) application. What is the easiest way to do that? I have database with several tables and I like to create some forms to create, read, update and delete from there. In the other side, I have installed Form Build CRUD and so on but I do not know how this module is use. Thank and sorry for my easy question.