

If they know what email and reddit it are, Lemmy should be pretty easy to understand, at least from a user-perspective. Replace reddit with Twitter/Bluesky for mastodon, Instagram for pixelfed, etc, etc. I don’t think understanding how email works at a tech level is important for being able to use it. Ditto for fediverse.
The lack of groups was the deal breaker for me, so after it rolled out to beta, I finally switched back to Firefox as my primary browser.
Last I tried, I don’t think you could reorder or drag/drop groups and selecting multiple tabs doesn’t result in “group tabs” in the context menu, but it is still decent enough.