You aren't doing anything wrong! This site/app (lemmy) and the concept (fediverse) are still super early days so there are going to be many problems. The site has some layout issues and there isn't nearly as much content as Reddit but that's just because it is new.

The most important bit, to me at least, is that the fundamental idea of the fediverse is good. We have had to many instances where social sites like Reddit, Facebook and Twitter can just decide what people can and can't say, they can remove our content and they can monetize it all without doing any real work of their own as far as creating content. The idea of the fediverse ensures that no one server, person or company has all the content and thus the control.

I really hope people stick with something fediverse whether it be lemmy, kbin or any of the other projects out there. Post content there, cross post it from Reddit if you really have to post to Reddit too for whatever reason. Please don't give these companies all the control anymore.