Help! My boomer brother is interested in the fediverse, but he's not loving mastodon.social. Help me get him on a new instance, please.

Greg is an MBA/Engineer. A rare breed that knows how to make things work. He once worked in a factory where the engineers were told to get permission before posting Dilbert comics on their door. So yes, he understands irony. Politically, I'd say he leans left, but then, I'm to the left of Bernie Sanders. He sucks at pinball, but denies it. He knows how and does use the public library. He likes fiction, popular economics, and science fiction. If he likes furry romances, he hasn't said so. Where can he find a fedi-home?