Im a Junior or Soph to a Fraternity?

[DubaiSis]

Your academic standing is what it says on your transcript. If you lose credits in your move, I think that could drop you down to a sophomore, but you'll want to confirm that with your new school.

As far as the other stuff, you're just going to have to jump in and find out. There are too many variables - the school, the fraternity/ies you are interested in, how much school you have left, your personality, your ability to get along with guys who are going to be younger and presumably less mature than you - to be able to guess this. Go through the process, consider as many options as you can (I know fraternity and sorority rush are different but as a guy with some things going against him, I'd cast a wide net), and be honest with yourself and with them.