I have been struck on the short time I have been actrive here how difficult it must be for one member of a couple to get sober if they are both drinking. It does seem to me that in most cases one has no choice other than to be selfish - or appear to be anyway. It is hard enough getting the strength to get oneself in a place where one is ready to do it and we know how easy it is to have those plans knocked off course. To have to take into account the drinking of a partner and whether or not they are on board for the ride and all of the potential complications involved doesn't bare thinking about - for me anyway!
I have no particular wisdom just because I am newly sober, except to say, go for it for yourself and if you are serious do whatever it takes. Invite your husband to follow you if you wish, but if he says no or just dithers get on with it yourself. Alcohol addiction loves procrastination!