Hehe.... Good old sore thumbs. You'll get use to it soon enough XD
There are some things that are definitely boring in Bioshock, but would you kindly give it another shot? Up to you though, but if not then definitely look into the story if you haven't already. It's has 4th wall stuff :O
But yeah, bejeweled can help with getting use to the movement on the 360's controller, button pressing, reaction time, etc, I'd say. Proof by experience isn't exactly reassuring, but I would suggest to at least give it a go.
I really don't have that large of a 360 collection yet, especially to suggest anything good, but if you haven't tried these games yet, then I would suggest to look into Alan Wake and Bayonetta. I only played the first area in Bayonetta (at a friend's house), but it was actually alot of fun, and the soundtrack is quite good too. Alan Wake had a more story driven feel, but it felt like i was playing a video game while watching a TV show all while sort of reading a book. Quite strange, but interesting. The later half of the game is quite action packed though, especially compared to the first half, although there will be a point in the game where you'll ask yourself "Why must I be in the woods again!?!?".