Jeff - yes. I have a suggestion. RUN. Don't look back. This stuff is more addicting than crack. Any muzzleloading equipment you have purchased, you can split up and send to the guys in this forum.

Now that being said and knowing that it is too late for you, welcome.We will all try to help you out if we can. Muzzleloading is funbut can befrustrating at times.
Being that you do not have much time to try a bunch of different bullets and powder combos. I would suggest that you go with a Powerbelt in the 245 - 300 gr range and loose Pyrodex as opposed to pellets. Yes, the pellets are easier butlimit your charge adjustment. Get a powder measure and you can adjust your charges in 10 gr increments to see what shoots best.
Good luck