Greek Life - Fraternity

Hello,
I am a current freshman at a much smaller school in Indiana, and transferring to Indiana University for my spring freshman semester. I was wondering if anyone could inform me on how competitive it is to get a bid for fraternity? A little about myself:

18 years old
Business Major
White, Jewish
Upper class area from Cincinnati, Ohio
Athletic, played sports all through high school
Weight lift regularly
Funny
Current school only has 6 fraternities, and 4 guaranteed my bids if I stayed.
Grandfather was in Sigma Alpha Mu at UC (legacy or no??), mom was in Zeta at IU, dad was in TKE for 3 days before punching the president and leaving, sister is currently in Delta Delta Delta at my school now, and other grandfather was a TKE (I think).

Anything you can help me out with would be amazing.