He have good full time job as software engineering (5 years experience).
He begin side hustle. He join a real estate agency. (which seem unreasonable because he should work in IT industry side hustle, which he have 5 years experience) But most of the time he taking class, and post picture of class on social media.
I am worries. It feel like a cult.
You may want to give us some more details. It sounds like your friend is taking a course about real estate, but so far I don’t see why these people are a cult.
If you can explain to me why they are a cult, then you can also explain it to your friend, and that’s a good first step to get them out.