If I am looking into starting my own business but also trying to start my writing career how am I going to get the start-up money for that when I have been applying everywhere and they are always full, and my parents won't loan me money because I have to work for it?

I need a job so I can take driver's ed, and I haven't had much luck applying to places, I live in a small town with not very many productive places for teens to work, and I am thinking about starting to look for any type of writing/English/caregiving paid internships. I am hard-working and I am the oldest of 7 kids in a range of 2 marriages. I do not have contact with my mother and I have been the main caregiver of my household. I just need a little help so I can work and gain money with the small time I have between classes, on weekends, after school, and on school breaks.