I thought one of the advantages of the Fediverse was to have one account but access to many services. Is this possible just not common? I already have a Lemmy account and Mastodon and I didn’t want to start making more just to try out the other services.
No. The Fediverse is access to syndicated content from a single website. Signing up at some other rando’s website is not going to give you any privileges on mine, and my account on my server doesn’t let me log into any of your computers.
The fediverse isn’t a handful of commercial services for you to demand access to. It’s a shit ton of small websites run by random individuals for niche communities, and a small number of large websites run by people with an impulsive drive toward self-punishment.