Arriving late to the conversation here, but I just wanted to give you my welcome to the forum. It sounds like you have a sensible head on your shoulders with respect to how to approach this poly thing. Use polyamory.com in addition to find out information, what does and doesn't work, and to post questions or concerns whenever you have them.
Hope you find that triad you're looking for when the time is right. Good to have you aboard.
Love means never having to say, "Put down that meat cleaver!"