Seems like you have perfectly valid concerns regarding the logistics of making such a move. Have you brought up these concerns with him? If so, does he acknowledge them or ignore them?

Ah, well that’s not ideal. I’m surprised just disabling the “Quick fixes” list resulted in ads appearing again; that didn’t happen for me. Have you tried updating the filter lists after disabling the “Quick fixes” one?

If uBlock Origin was working fine until recently, you can try this workaround (it worked for me when YouTube suddenly started showing me “Ad blockers are against YouTube TOS” messages):

Open uBlock settings in Firefox, go to “Filter Lists” and uncheck “uBlock Filters - Quick fixes” under “Built-in”.

Then click “Apply changes” and restart Firefox. Hope this helps.

Is it as interactive as Lemmy or is everyone kinda shouting into the void?

I’d say it’s a somewhat different kind of interactivity than Lemmy. Your typical Mastodon user won’t have many followers, but that doesn’t mean you’re “shouting into the void”. Similar to Lemmy, you can comment on (reply to) others’ posts and lots of other people can join in the discussion that way.

Is there an equivalent to communities?

Not really, but you can follow hashtags for whatever topics you’re interested in. Or follow an account for something you’re interested in (e.g.: organizations, weather, hobby news, content creators, etc)

If not, how do you find stuff you care about?

Follow people/organizations/tags that you find interesting and their posts will populate your feed.

And is reblogging the equivalent to upvoting? Is it like a like and share in one?

Not necessarily. Reblogging (“boosting” on Mastodon) is just putting more eyes on someone else’s post by sharing it; it isn’t equivalent to an endorsement per se. You can favorite posts on Mastodon, but I don’t think there’s really an equivalent to a “like” or “upvote” button.

Do they have memes there or what’s the range of content?

The range of content is as wide as anywhere else, memes and all. Can vary from instance to instance, though. (e.g.: code of conduct on mastodon.social may be different from fosstodon.org’s)

How does it compare to bluesky? I have used bluesky but the tone there is kinda shallow imo, rarely any meaningful interactions.

I haven’t used bluesky, so I can’t comment on this one.