Talk, talk, talk
Have you discussed you desire to explore your Dom side with your husband? Was he receptive to the idea? You seem to know this already, but open, complete communication is definitely a must in these situations. As you want to be the Dom in this new relationship, you can probably be fairly hopeful that your husband will be receptive to it. If you wanted another Dom, it might be trickier. Anyway, good luck! Talk it out!