Help a teenage girl to start a business

Since a very young age I wanted to have my own business and be independent from my parents, so I have decided to start one but I NEED YOU HELP. I am a first year university student on a student loan. My parents only manage to cover part of my living costs in the big city and although I am currently working, I still want to fulfil my dream and have a cosmetics brand of my own! With YOUR HELP I could start my business and be fully independent