I want to become an erudite or atleast study all the basics of mathematics, logic and hard sciences such as physics and chemistry. I'm thinking of going to khan academy, learn all the highschool stuff there and proceed to read college level textbooks before I enter college(I am grade 10, 18 y/o student)

I've been teaching myself mathematics for almost 1 year now and have covered majority of algebra(I'm using an algebra textbook, I'm not sure if I should just use khan academy) but mathematics is not enough. I want to have extensive experience on problem solving in general.

Any tips? study program that you use etc, experience or overall any advice will be appreciated.

Jannies, this is related because I'm asking for recs about learning how to study math and science and this is the most relevant board for that.