Managing my own money

It's not that I hate math. I do love this subject but when it comes to managing my own money with my own style, I find it really hard. For this past years, my mum is the one who will help me to manage my money, how much should I spent on my food, house rent, college fees etc..but now that I'm 22 years old, I think it's the right moment for me to start managing my own finance.