I think one thing that may help with this is letting users stay on their instance when browsing others. Right now, if I want to hop over to another instance, I can definitely link there or comment if using the appropriate channel, but actually going there makes it seem like I am signed out. Implementing features like this https://github.com/LemmyNet/lemmy-ui/issues/1048 would help make the experience feel more cohesive, and encourage exploration of other instances without confusing users and accidentally encouraging sticking to one's own instance.
Yep! Since it is a smaller community, it feels less like screaming into the void. There's a good chance people will see a comment, even if it isn't made in the first hour or so.