The best I can offer is - run your own race. My first half is in Feb and it will be a run walk event. While I have a time goal in the back of my head, my objective is to finish standing up :)
If you and your husband are at different fitness levels, explore parts of training that you can comfortably do together, and be honest about training you may need to do separately.
Decide what really matters. Do you want to experience the course together and cross the finish line hand in hand? Or are you happy to start together, run individual races, and meet at the finish line?
Knowing those answers early on can eliminate anxiety and make the experience a lot more enjoyable.
Congrats on your wonderful goal!
***Just Keep Moving***
5K PR (recent) 38:49
5K PR (ever) 33:22
10K PR 1:28:52 (one month later)
10K (first ever) 1:32:11
HM PR: 3:31:10 www.LizMLopez.com