I don't think it's the craziest idea, and in some circumstances I would probably do that, e.g if I had an extra house or two.

But even in that case I would try to take advantage of the frothy market before selling a house. Raising money is hard and takes a lot of effort even for people with connections and good credentials. But if you succeed it's probably going to be more money and much less financial risk for you.

The best advice I can give to you is try to join a startup accelerator. It sounds like I used to be in the same position as you are (no FAANG, no fancy degrees, not knowing any founders / investors, also a foreigner. I didn't have a house to sell though, lol). Joining a startup accelerator changed that very quickly for me and helped me raise money.