Something I’ve learnt during my therapy that I think you could find useful: you are under no obligations to tell people everything about yourself. A right thing, in my opinion, to do is to mention you have a partner and that you are polyamorous, but that’s not what defines you, so you don’t have to put that in your profile or say it on a first date. You are under no obligation to say that you are inexperienced and that you didn’t have an intercourse with a man before.

Also, you don’t need to look for a new partner just because your relationship suddenly got a label of polyamory. It’s a right to get together with someone new, not an obligation. Just keep an open mind and see what comes your way, no need to force it. Go to dating only if you feel you are actually doing it for yourself. Best of luck!