brilliant.org is shilled way too hard for what it is
if you're a beginner or new to a topic then it'll seem inconsistent, as in it jumps from easy to hard with no inbetween, and makes a lot of assumptions of what you already know
brilliant.org is best used as a supplemental tool to reinforce your learning and to look at problems from a different perspective
if you're a complete beginner just pick up a textbook and watch youtube videos whenever you're stuck. to solidify your knowledge of a topic do all the questions and exercises, then look for more online
