When I click on their user page, I don't see any subscribe button. I don't want to miss their new comic.This guide is outdated.
I'll use my novel as an example. Here is a screenshot:
If you are subscribed to any of their work, you will get a notification when they make a brand new series that you haven't subbed yet.
EDIT: at least on the desktop. Not sure if the app does this.
You have to go to their comic/novel and click the "Add to library" button. It will automatically sub you to their frontpage as well, and when they'll post a new status update or a new episode of the work you subbed to, you will get a notification about it.
