There is a ton of reading available to you here. Welcome and I hope that you find the answers you seek.
I think the first requirement you will need to make this work is to heal the wounds already present from hubbys past cheating. That will require both of you being willing to do the work and be completely honest with each other. I certainly don't know you or your situation so please don't be offended but I am already worried for you. I wonder if you are truly open to poly or if this is the way you can feel like you will be kept in the loop by your hubs. Like I said, please forgive me if I am way off base. I'd just really love to come here one day and read that you and hubby now have excellent communication and trust has been re-established and that your lives are going swimmingly.