I give you a piece of advice man. Don't rely on your siblings. Your parents can, but not your siblings. But since your parents have some attitude problem also, I guess you got no one to talk to. Maybe your aunt/uncle/grandma/grandpa.

My family, I don't really care about what my siblings do, because they are big enough to know what can do and what can't do. Same as me, I don't like to be control. So we always mind our own business. I only care about my mom, that's all. My father... God knows why.

I always say this to myself, correct and improve myself first before correcting others. Use the time wisely on myself better.

How about taking study loan? PTPTN. If you are smart and creative, run your own business.

Btw, I don't believe in certificates, so whether a person got no cert. to me doesn't make any difference than other.