Another Alabamian chiming in here. Yes, Alabama is tough for poly-talk socially, but it's not impossible.
There was recently a thread about how to advertise one's self on dating sites. I'd read that if I were you because there are a range of opinions that tie into this one.
You'd be surprised how many mono people in Alabama (at least where I am in "the big city" ha ha) can wrap their heads around it if you explain it to them. Some say you should explain it in your dating profile, but I disagree. I think explaining in person can work wonders to get past that poly stigma barrier.
Speaking of dating sites...are you using any dating apps? Like Tinder, OkCupid, Plenty of Fish, or DateHookup? Generally if you do get a back and forth going on there, the under 35 year olds using these apps can handle a conversation about polyamory pretty well.
That's just my quick and dirty advice.
Me - male, 42, poly, straight, in a serious relationship with Audrey, also casually dating.
Audrey - female, 20, poly, pansexual, also casually dating.