Im became a full time artist ever since i settle my highschool. Basically in fine art field. Nothing digital or computer art related. My advice to you is its gonna be very very hard if you dont have or go through any art school. Going to school will help you in knowing people and also learn from the right art people. If you decide to venture into digital art or anything computer art related, a certificate will help you. But if you doing fine art like comics or sending artworks into galleries and all, dont waste your time in art school. Spend time in reading, practice, go to art exhibition, talk to people there and go back practice again. Make it perfect. Your art will speak and your behalf if its good. But, its never gonna be an easy path. It will be super worth it once you achived your goal. Doesnt matter what you do in life. Idk what im babling about but yeah hahah