I don’t fully know the answers but if it helps I’m using Kbin right now. Also I’ve discovered a web based Lemmy client called wefwef that is remarkably similar to Apollo - so I might well sign up for a Lemmy account too:
Here I am using Lemmy from Kbin and not yet knowing what I’m doing. Also I can’t figure out how to reply to the main post. But I can reply to a comment. Good fun though!