I generally find it too confusing to use the word "polyamorous." Most folks either have no idea what that is or they think it's swinging. I tell people I am not interested in exclusivity. They usually get what that means, and it's easier to discuss it further. I don't look only for polyfolk nor just within my local poly community, either. Lots of people are open to it even if they've never heard the word before.
This has been discussed in numerous threads before. Do a search, maybe look for the tag "dating."