Is there any way to actually practically use kbin/lemmy from a mastodon account? Finding a post using a kbin/lemmy server and then copying and pasting the url

Is there any way to actually practically use kbin/lemmy from a mastodon account? Finding a post using a kbin/lemmy server and then copying and pasting the url into mastodon in order to interact with it is not practical. I have also seen a lot of people say they ended up subscribed in a way that resulted in getting all comments instead of only top level posts when they subscribed to communities, which is also not at all practical. Is there a way to subscribe to top level posts within a community?