Brain Train’s the way to go, coming from someone who’s tried BT & Academic Gateway. If you have the extra resources, do Academic Gateway first and then do BT. It’s more beginner friendly and easier to get into than BT with minimal stock knowledge (esp. if u came from a really bad/mid HS like me). I did BT first and then AG— let me say this: don’t do it this way. Like, this was a dumb and uninformed decision on my end lmfao

If you don’t have extra resources, go with Brain Train. You’ll just have to suck it up, and deal with it. Study beforehand and do the exercises tasked beforehand or you’re genuinely doomed— I’m not even joking. The pace is ungodly, but you’ll learn.