I am 18 and have been singing for years now, I got very dedicated when I was 15 and for two years I have been improving my self and I have already broken into a range that I thought I could not sing (it is actually not that high). I have a range of about E♭2 to F#4 if I stretch it a little (Although I am almost certain that it is unhealthy for me to sing that high the current way because I could be singing it wrong). I consider myself a baritone and I just want to hit up to a G#4 in mixed or chest. I already can sing falsetto but singing a G in falsetto is not as fun or as flashy. I just wanted to know what advice anyone has for me to help me get to that range, or just sing more healthy and improve my current range if I can't sing higher.
If it helps, my inspiration is from Michael Bublé, and Frank Sinatra. They are the reason I want to sing into the upper range of the Baritone voice. Also,some advice to help me sing D4-F4 stronger and healthier would be appreciated.
If I need a vocal trainer (not that I even know how to get one, or one that is qualified) how long on average would it take. Now I am patient and I will work until I get it and I don't have a deadline or anything but I just wan't to know.