Almost 21 still living with mom and have no money. You need to focus and work hard. That is 3 years wasted that you could have at least 30k in the bank just by working fast food and not wasting money. Don't waste it on a pussy mobile, buy cheap used cars or ride a bike and save 80-90% of what you make for a house. Don't chase pussy avoid it if it gets thrown at you pass on it or wear a rubber and pump and dump then pocket the rubber and take it with you. Your young you don't want to hit 30s and looking back at what you could have had if you were wiser.

If you move out your going to spend 60-80% of your income on just rent and utilities. You will most likely need roommates at that age and they can worse than your brother and fuck you financially.