It sounds like you're describing a need to use the "subscribe" function. Go to each community you want to see posts from on your home feed and subscribe to them. Then you switch your view to be "subscribed" instead of "local" or "all". So the only communities you'd see in your home feed are the ones you're interested in.
post
replies:
According to the asklemmy community (which is not about support for lemmy):
all 5 comments