You are better than I was at 20. I wish I found this site when I was at your age. At 20, I was so shy, so depressed and I was too afraid to talk to anyone especially hot girls. I had no dream & I thought the world had ended for me and I wanted to commit suicide. I'm the oldest son in my family. I don't have anyone to guide me through life. I hated my father. You are better than I was. You're lucky to have a big brother who's good with women. Why not ask him how?
The only reason why have already given up on trying to talk to girls for the rest of your life is that you're seeking an easy way out of this mess you're doing. To be a better man or even a great man is not easy. You will need to face your fears. It's the only way out. No amount of money or tricks can get you out of it if you don't want to face your fears.
The only way to eliminate fear is just to face it head on.