Welcome to our forum.
I always recommend friendships (platonic) first, that way you can "come out as poly" before any dating enters the question.
Sorry to hear your last poly relationship came to an end. Hopefully you'll meet someone else who'll be just as ideal.
If we can help on Polyamory.com, let us know. Post your questions and concerns as they come up.
Glad to have you aboard.
Love means never having to say, "Put down that meat cleaver!"