If you're asking about Alex Hormozi, he is indeed quite legit. He of course tries to advertise joining "skool.games" which is a community of entrepreneurs that you do have to pay a hefty amount of money.

Yet, he has plenty of very good advice for free on his YouTube channel: https://www.youtube.com/@AlexHormozi.

Buying and reading a book won't hurt. Just make sure you are focused on creating something new and/or solving people's problems.

Paul Graham also has some excellent blogs on this topic: https://paulgraham.com/google.html