A few questions

I'm sorry if these are answered already or otherwise obvious. I've had a chance to explore a bit. Made accounts on lemmy.world, sopuli.xyz and kbin.social. After the last few days kbin.social has become my "main" (as seems to be the case for a lot of people).

Is there a quicker way to access the communities I've subscribed to than going in to my profile, subscribed tab? Is there a push to edit the top bar to make it function more like RES so communities I want to access are 1 click?

How does reputation work? It seems like mine is negative and decreasing, but I can't find any cases where my posts are not at least positive. Is this some kind of ranking relative to something? I only ask because on Reddit there were mod tools built to filter content from people with negative karma - this was actually a good tool to prevent spam and harassment, and I could see the same happening here (eventually), but I want to understand it more.

Is there some kind of change planned to sort order to not so strongly prefer the biggest communities? Even subscribed feeds are overwhelmingly dominated by content from one or two communities for me, I have to go community by community to get a sense of what the current discussion topics are.

If I go to a community on a federated server, and there is a post I know is present there but I cannot see it on kbin, is there any possible way to interact with it? Or is it simply impossible because content can only be shared starting the first time the communities federated?

Can there be some kind of flag to know if when you interact with a post from somewhere, it actually won't show to everyone because that server is defederated or otherwise not showing up in search results (thinking specifically of sopuli.xyz here) ? I know for instance if someone from lemmy.world posted to beehaw.org while defederated, people on lemmy.world will see that but people on beehaw.org won't. I can see this becoming insanely confusing long term if we don't have a way to flag it now. It also sounds like there's no way to check and re-grab content that was posted during a defederated period or potentially due to other technical hiccups. This is strange and makes the platform more confusing than it seems like it needs to be. Is there any plan to do anything about this?