I'm going to ask my brother to start paying for this house
Why are you going to ask your brother to pay for the house?
I need more money since I have been paying for college.
It's understandable that you may need some help financially. It's fine to reach out to family and ask for financial help when you are struggling to pay bills. Asking for help will ensure that you do not fall behind on necessary payments.
I'm going to keep the money. I'm want to live on my own now and don't want to hear him nagging either.
If you aren't living with your brother, then you shouldn't expect him to pay for your house. It's okay to ask for help, but he also has to pay for his own living arrangements, too.