DIRECTLY FROM EVO's SITE
As for consulting evo or other online shops fore information on gear... take their information with a pinch of salt. Just as an example: the Flagship was rated as intermediate board some weeks ago (they corrected this by now), blue-tomato shows a profile of a hybrid rocker for it (instead of a hybrid camber which would be correct), and the size charts on blue-tomato gives EUR sizes of US men's sizes for women's boots. It's always best to check on the manufacterers sites, them shops are full of mistakes.
OP, it can well be that having the wrong stance set up affects your balance, especially in the beginning. I need some runs on a new board till I find the right position and have a screwdriver in my pocket the first day. I always begin to set up centered stances i.e. symmetrical from the middle inserts. If the baseplate don't allow to take the middle ones or the stance is too narrow/wide, go one further outwards or inwards mirrored with both bindings, depending on your stance width. My stance width usually doesn't fit the inserts symmetrically thus I have the hind one one insert further back.
Considering the lessons... I never had one which I sometimes regret. Decided to learn to ride switch recently and made a complete idiot of myself, not being able to link two turns (which was a bit embarrassing; I'm riding many moons and expected it to be easier). It took a friend - who was an instructor - only some minutes to point out the major faults and give me some hints how to work on them, and see, I was mastering the hill backwards (still very clumsy but no longer on my butt
) Point is: I would have figured it out somehow somewhen as well, but progress is so much easier if someone who has learned to teach (learned to use the right words and to analyze movements) can give hints.
Damn.. I really need to learn how to post a comment without writing a freaking book!
I'm so guilty of that as well