Welcome to our forum.
I wouldn't rush into anything; you have much to think about before deciding exactly what you're looking for, and a great opportunity to explore those things through Polyamory.com. Have a look at our various threads, and see if any thoughts/questions/concerns come to your mind. Then you can post and get relevant info/feedback.
Sorry to hear your recent relationship didn't work out. It sounds like it just wasn't meant to be, or, it was only meant to be for a few years.
Hope you enjoy your stay here.
Love means never having to say, "Put down that meat cleaver!"