Huge congrats on his sobriety.
My husband sounds just like yours! He'd been sober for a few years and needed friends and a hobby too. All his friends were drinkers. In fact, all our
friends were drinkers. So after he got sober our friends sort of dropped us. It was a lonely time for both of us.
(by the way, I don't drink - never have)
I racked my brain on what sort of hobby to get him into, too. I knew once he'd find his "niche" he'd make friends. Problem was, he wasn't the most social fella. Or motivated. He needed a push. From me. So I sought out things for him to get into. Sports were out. Religious based groups were out. We did join a Corvette group but we never really fit in with them (many were drinkers). And we don't have kids, so we didn't fit in with most of the couples in our age group who were all into the family thing.
So I got to thinking.. my hubby always seemed to like radios. He liked CB's and scanners for his job, so I asked him about Ham Radio (Amateur Radio). Well, long story short, he took to it like a fish in water; gradually working up to earning one of the highest licenses there is and joined a local group - meeting a bunch of people. Yes, even I got into it (not that I have a deep interest in it, but mostly to support him and understand what he's talking about when he discusses his radios) and I have my license/ticket and even my morse code endorsement, too. Shocked myself actually - I got a 100% score! Oops, this isn't about me.. lol, sorry.
Anywho, when my husband found Ham Radio as a hobby and met so many people and formed real live friendships, his personality.. his SOBER personality.. totall blossomed. He's a totally different guy...in a very good way.
Don't give up - keep suggesting hobbies for him. Bowling league? Volunteering? Astronomy? Radio controlled cars/planes? Geocaching? Golf? Exercise? Try them out with him as a family event if you can. Ask questions. Find local groups. I'll bet one will peek his interest sooner or later.
Best of luck!!