These guys have given great advise. I've lurked here on tndeer for years and only recently registered. I've only posted a time or two since then. I mostly post on Trad Gang and The Leatherwall (check out these two sites if you haven't already...worlds of trad info there if you can overlook the blowhards). Thought I'd chime in on this one though.
I've been into traditional archery for about 6 years now. The first couple years were the roughest. I had nobody to light the way for me and everything I read online had a complete contradiction to it on another site it seemed. So I learned everything the hard way...trail and error, and a dogged-damned determination to be able to do it. I have came a long ways. I'm no Howard Hill...but I'm comfortable shooting at hunting distances and am fairly proficient at setting up and tuning trad bows and arrows now.
The guys are spot on...you have to find your own style. The more sites I looked at, the more books I read, the more vids I watched, the more I overthought it and screwed myself up. Take in all the info you can, pile it all together, and do what works for you. Most importantly, find a comfortable, repeatable anchor point...it's all down hill from there.
And FOLLOW THROUGH after release...that was the hardest for me.
I would have thought with that bow, at that weight, a 500 spine arrow would be a better fit. But if it works, roll with it.
If you are located close to Cookeville, you are welcome to borrow a couple Masters of the Bare Bow DVDs. They didn't do much for me but make me think too much. But there are several helpful segments on them. I refuse to read shooters form forums or posts anymore...if I think long, I think wrong lol.
Good luck in your endeavor into traditional archery. It is very rewarding when it all comes together. Recurves and longbows are the only bows I bring to the woods and the water now.