Hello, I just started the program with HTS volume 1. I'm 24, and I've had vocal lessons for the last 6 years and graduated from college with a degree in music for voice. in the video program, they are emphasizing stretching chest voice as far as possible like C5 (I am a tenor). Now, I can sing up in chest voice up to Bb5 and other times tenor C5. But When I sing this high in chest voice for a prolonged period of time (range of G4-C5), my voice becomes strained and it doesn't have the stamina to pull off the rest of the song or other difficult high register songs. Once you start working on head voice and perfecting the bridge and mixed voice, will this allow me to sing that range (G4-C5) with much more easy and comfort, but still with a powerful sound like chest voice once I learn to mix and bridge to head voice at different parts of my voice?