What Kcmpls said.

Do you have an LBS where you can take your bike and have them give a quick eye to how it fits you today? Of course you need the saddle adjusted unless you are comfy doing that, or if your husband can get it back to where you need it. A few other tweaks might help as well.

Just take it easy, a few miles at a pace that is comfortable to you TODAY is a great start. As your body starts to adjust, you will find that you will naturally want to ride further and a little harder/faster. Don't compare your riding today with what you did before - this is a fresh start and it will be an awesome one!

Congratulations for getting back on the bike! I would say, for now, to not worry so much about an actual training plan but just to ride your bike