Oh it's in your last screenshot, the Subscribe button, it is very hidden away for sure, I may open a request for them to add it to the main screen there next to Sidebar. Glad you found it though! Those are some of the pain points I think they're working on solving, some of those things you don't think of until you get some users on your app
Edit: Opened an issue for it, hopefully your pain will make it easier for future users!