Yeah sleep is pretty important, I do lots of my drawing at night, usually nights where I have no school the next day or weekends I stay up until about 1 or 2 Skyping with my friend as we share art ideas. My computer is currently out of commission and I can't really do that at the moment. As for relaxing music I do have my fair share of very calming music.
I've thought of giving up as an option a number of times, I never feel like I'm improving but apparently I am says my peers. I don't plan on giving up but the option is always there. Thank you