Will you get notifications if a person you follow has posted a question or replied to anything ?

Nop, you only get notifications from other people's posts if you "follow" the original question/comment/thing

I don't reccomend that cause one of the only rules when posting here is to keep things related to the site/mangas/comics or you can get banned / shadowbanned. No one will see your questions, comments, posts etc. Just a heads up.