I'm confused. You are both straight but agreed that each of you would try same-sex activities? Um, why? Also, you do know that polyamory is not focused on sex? Maybe you would rather look for a swinger community if recreational sex is your focus, rather than relationships. Or, perhaps I am just misunderstanding your intro.
I suggest reading around the different forums here and asking questions. Check out the Online Poly Resources
thread in the Golden Nuggets forum.