I want to start a carwash, helmet cleaning, or waffle business

Problem/Goal: M (24) here. I badly want to start a business here since I'll be graduating soon. Any tips po how to start with any of these kinds of businesses?? I want to help myself and my parents. Ayaw ko na maging pabigat sa kanila. Nag try ako ask ng advice to people around me tas sabi nila mag work daw muna ako. I have 20k savings pero feel ko di to enough. How to start a business with a 20k savings??