Hey, all. Newbie around here, hoping you all can help me out as I venture into the world of bowling...

I've always been a recreational bowler, but am joining a league for the first time this fall. I'd like to buy a ball, but I'm not exactly sure how to go about it, given that I'm essentially starting from scratch.
I've been a 2-finger/palm bowler for years (don't bowl often), but am considering trying to switch to a traditional grip. I threw a non-house ball for the first time a couple weeks ago (still using 2-finger/palm), and ended up throwing a 222 and 299 (doh!), both of which were personal bests. Even given that success, I still think I'll be better served learning a traditional grip. What a difference having a "real" ball makes!
So, any suggestions on how I should go about choosing a ball and drilling pattern? I have no idea how I will throw a ball using a traditional grip, and none of my bowling buddies have any balls that will fit my fingers.