I to am relatively new.
I would suggest that you and your hubby sit down and really talk about what each of you wants from your polyamorous relationship. Develop a list of expectations each of you has of the other when meeting with someone...i.e. obviously safe sex, no sex with a new person without your hubby/wife meeting that new person.
I'm only guessing but I don't get the feeling that communcation is an issue if he is suggesting poly and you are already checking it out. But humor me when I say communication is huge in any relationship ecspecially a poly or triad relationship.
Respect is paramount to making all things work. If you get into a situation and don't feel comfortable or safe, respect yourself enough to remove yourself from the situation.
I wish you good luck and if I can help you with anything I would do my best should you ask.