(singing)Should I pursue my pion to become a fromtman?

The only way to improve your voice would be through lessons or self-teaching. Practice scales, pitch, and holding steady notes. I was blessed with a decent voice when I was young, and it has become better as I aged. Its difficult to find your vocal range as well after puberty. Because your voice has changed, you need to rethink HOW you will sing. A great tip I was given was to practice with choir music. Not only does it use the full range of one's vocal chords (pending on what voice range you are in) but it teaches you to hold notes and stay on key, which sounds like your biggest concern. Good luck in your endeavors!