Aah, you went to the dark side. I thought we had decided that you needed a Mathews. Oh well, I think you did just fine with that bow. Did you end up buying it at a local shop? If so I would expect that they would offer some lessons for a new shooter to get you off on the right foot. Its important to learn correct form from the beginning because its hard to change poor form later on. I have had several Trophy Ridge sights, and Ripcord rests, I think you did just right. For your stabilizer and quiver I would go on ebay and save some money, they are pretty easy to put on yourself. If you want a good one piece quiver the Sof-lock runs about $35 and works great, a Sims S-coil or similar stabilizer will do just fine for under $20.
Best advice I would give you is shoot every day. Even if you can only get 5 or 6 shots in at 20 yards, make them count by concentrating on form. Get to where you have to shoot at a different spot every time to avoid breaking your arrows. But feel confident at 20 before you move back to 30, then 40 and so on. There is no hurry to start shooting long range, you have a few months before the season starts. Good luck and I hope to see a buck posted next to your grinning mug in a few months.