It sounds like you have no idea what you want to do with your future - DO NOT pick a course just because you don't want to disappoint your mum. Do you want to be depressed and end up dropping out again? Instead of focusing on going to uni focus on finding out what you want to do with your life. Don't do a degree for the sake of it. You're 22 and though it may not feel like it you've got plenty of time to figure things out