Consider this another vote for Ubuntu or any of its variants. They’re beginner friendly, and established enough that you’ll find plenty of resources written specifically for them. Linux Mint is another one I’d recommend for beginners, it’s designed to “just work” out of the box and be an easy transition for Windows users.

Then it’s just down to using it some. First and foremost, leave Windows installed until you’re comfortable with whatever else you end up trying. Whether you partition, or make a bootable USB drive, or even just a VM, use some kind of temporary space for practice. The terminal is a lot less intimidating when you aren’t learning in your main environment, you can go break things and see what happens.

That they follow the same standard doesn’t make it irrelevant, it’s still a new standard being added to the pile. It’s also just a goof.

There are situations where it can be helpful, but in general I don’t think intentional cross-posting is going to help. It could just as easily homogenize the communities and stifle what momentum we do have.

Communities will establish themselves organically over time, as we’ve seen with every platform before this. Trying to force it, or really influence the process at all, is just as likely to rub some folks the wrong way and lead to more fragmentation.

Until things settle, it seems like a more effective tactic is to choose where you want to focus your attention and add to the content in a natural way. Instead of cross-posting, just decide on a “main” community for any given topic for yourself and contribute there in a meaningful way. If another community in the same space looks like it’s taking over, reevaluate where you want to place your focus. Help build somewhere for the sake of building, but not for the sake of the numbers.

Alternatively, just ignore the “problem” completely and trust the process. Post in the first relevant community that springs to mind. Engage with posts as they come through your feed without paying any mind to the size of the source. The most important thing is increasing total user count across the Fediverse, and diverse activity can be a huge drive for that.