Are you in college? You can transfer into a conservatory or major in music if you're that into it, but you should really get a college degree. Singing is a great gift, and you can always sing as a hobby (church choir, with friends, etc.) but dropping out of school and attempting to form a career out of it is a gutsy move with a lot of risks. The least you can do is have a backup plan, which generally requires some sort of further education. Unfortunately a singing career needs a lot of other people's interest, you'd need a producer, a fan base, a way to travel, etc. Try talking to someone who's taken that track, and see what they think about an education, what skills you'll need, etc.