Chipougar,
Since you posted on the forum, i am guessing you are the one that initiated the conversation with your husband about some sort on polyamorous or non monogamous relationship. You mentioned rules and boundaries but only stated one in that you would not go beyond flirting until he catches up, but apparantly from your second post you already have someone you are interested in.
I would suggest to you that you and your husband have a real serious conversation regarding all of your rules and boundaries, and have a discussion of a Plan B that involves renegotiating these things if everything does not go according to your plans and expectations. You are getting into complicated territory, especially if your husband is just going along with this to make you happy.
As far as catching up, that is probably never going to happen. No matter how you two decide to go about meeting other people, you are going to have an infinite amount of more options than he is simply because you are e female. You will encounter fewer men who will not want to have sex with you or pursue you because you are married, whereas your husband will have a much more difficult time finding girls who want to date or become knowingly intimate with a married man. If you go online, you will be bombarded with offers, and he will struggle. If you go to clubs, you will have guys chasing you and he will also have a more difficult time, no matter whether his "game" is good or not. Just try going our separately and seeing if you can meet someone to go homne with or date and see how many more options you have 99% of the time.
All of this is OK, if your husband understands completely what he is getting into and can accept or learn to accept that eventually you are going to start to date and probably have sex and he may or may not be just watching all of this happen. Of course there are exceptions to what I have described, and i am guessing other posters may tell you that none of that matters, but this is between you and your husband and in the long term if the two of you are not totally on the same page this experience of opening up your marraige is going to be a negative experience, which possibly disasterous consequences.
Good luck to you.