Well... it worked! I finished up and he told me that all the strokes and everything felt really good, nothing that he could teach me would help 'em, it was just a matter of getting better the more I work. He also noticed a couple of the strokes that I've made up on my own and said that he liked the variation and that I should keep 'em in my routine.
So, all in all, I'm happy about how things went today, and I'm now convinced I can actually make money doing this. ;P