1. Get a vocal coach who knows the voice, musicianship, style, acting, and dance. OR
2. Get a vocal coach who knows the voice, musicianship, style, and acting. Study dance at a professional studio. OR
3.Get a vocal coach who knows the voice, musicianship, and style. Go to acting classes and dance classes.
4. Give yourself 6 to 12 months to prepare.
Taking one voice lesson is about as smart as taking one flying lesson and then piloting a plane. Good luck! Someone said that when preparation meets opportunity, that is what luck really is.
BAD MUSICIANSHIP = BAD SINGING It doesn't matter if you know the terminology nearly as much as it matters: if you can hear melody and harmony accurately, if you can hear rhythm accurately, if you can understand and assimilate music accurately.
Most singers do not want to become a national joke. Study and preparation can help avoid bad consequences.