Carpentry self business

hey I'm a 17 year old high school student who is interested in going into self work as a finish carpenter during school and also when I'm finished, but I have no clue on where to begin I was thinking about doing an apprenticeship to start out and once im finished my 4 years of Apprenticeship I would go into a self business where if someone wants as an example finishing their basement drywall,electrical, possible plumbing and stuff like that they would call me and my partner's if someone can explain on where I can find them thank you.