How to create a database with user registration for courses?

Question

Database design

How to create a database with user registration for courses? The site has been published .
Table with users (id, name, email, balance and password)
Table with training programs:

When registering for a specific day of the program, it should appear in the student's personal account.

Answer 1

Make a third table, where there will be id_user, id_lessons, then make a selection only for relevant ones with a date condition.
Upd. And I would change the table with classes, there is not enough field for the date of the lesson.