I'm glad you have come out and are feeling better. However, I do feel bad for your wife in this situation. This is a big deal. If you and she don't want a divorce, take it slow and talk everything out. Put off any other relationships for the time being until you get the issues of the first settled, regardless of who you've met and are interested in. "I am poly and would like to be open to others" is hard enough without adding "and this is who they are and I'd like to date them now".
I'd rather be hated for who I am than loved for who I am not.