Some beginner sx tracks though are a blast, like DelbSX.
The thing is with mx sim you need to do research and experiment a ton before you find a setup that works and you can learn with, I'm a pretty fast rider for outdoor tracks but still cant play sx consistently to this day, personally i don't find it that fun (prolly because im not good at it) and its just a whole other thing to learn in that game, hard as hell. Just to backup what you said and also more tips.