Cute drawing...I hate drawing hair too...What I do is make several strands of hair as the base of what the hair is gonna look like...and add several more to make it at least look like hair, lol...then color it in...

I really like the circles and their colors..I think they go nicely...I also think the eyes should have been a bit shinier to bring a bit of life into them...and yes, yoga hurts..I've tried before..