Senior three always review, and if you can learn it at that time, you can make it up soon.
What you have to do now is to learn what you want to learn in a down-to-earth way. If you have a tutor in the top three of your class, how can others get along? ................
Do what you should do. You will study probability and statistics next semester. Find a book to preview first! You don't need to tutor yourself to preview! Don't do things you don't need to do now (such as sitting on the college entrance examination paper, which is what you need to do after the first round of review for the college entrance examination). Don't scare yourself.
Have confidence in yourself!