What should be changed/added/deleted in my database?

Question

Database design

Good afternoon everyone. I am doing a graduation project "a program for teaching schoolchildren to program".
Question: what should be changed / added / deleted in my database so that it is compiled correctly?
And now a little about the program:
Features of the program:
1) the presence of lectures and tests on topics;
2) the possibility of gradual learning (1 topic (lecture and tests) per day), as well as independently on simulators (3 simulators in total

example of simulators

choose the type of simulator and practice in it on past and current topics).
3) fixing classes on the main page (there will be indicated the passage of classes by day from the moment of registration to this day, more precisely, was the lesson or not on the selected day)
4) simulators have a time limit (each type of simulator has its own)
5) for the correct doing accrue tales

here are mine

tables:

1 user (id, name, password_hash (найти как делать хэш))
2 test (id, type, theme_id, timespan, mark)
3 question (id, theme_id, question_text, question_image)
4 answer (id, question_id, answer_text, isCorrect)
5 usertest (id, user_id, test_id, isPass)
6 schedule (id, user_id, theme_id, percentile
7 calendar (id, user_id, date, successful)
8 testlink (id, test_id, name, url)
9 theme (id, theme)
10 answerelement (id, question_id, text, number)

I would be grateful if you could help me create the database correctly.

Answer 1

PAIDED
you do it, fill it in and start extracting, you look at something and fix it