This might be out of left field, but there's never been a better time to pick a fighting game to get good at. Especially if you enjoy multiplayer games. Don't need a group. Matches are like 4 minutes if that. Injustice 2 could be a good fit.
No matter what you end up doing, I'd love to hear some follow-up. I feel like I've heard it both ways with young kids. On one hand, the baby is soaking up a lot of time. On the other, you now have an excuse to be up all hours of the night anyway. Not to mention, you aren't going to making very many "plans" outside of the house. It could go either way.