Welcome, @rayray115!
That sounds like a solid, classic tattoo, and I congratulate you on your good taste. I don't think you'll regret it, but there's no way to know that for sure. I thought I knew everything when I was 18. I do wonder what kind of shit tattoo I'd have chosen had I been interested in tattoos back then.
Sounds like you've been planning and saving for a long time. Getting a half sleeve for your first tattoo is a big step, but only you can decide. Good luck!