Welcome to our forum.
You might try our Dating & Friendships subforum
; also there are off-site resources:
Some of those are dating sites, others are listings of local poly groups. You can also google "polyamory" with the name of your state or city.
Besides all that, spend some time looking around on the threads on this site. There is a lot of valuable info here; it will help you prepare for finding someone.
Glad you're aboard,