So I might be a bumbling idiot but I can't seem to find any button or link where I can edit a Story that I've created. (Things like Tags, Viewpoint, Title etc.)
On the sidebar, click on my stories which should give you a list of your works. Next to each one there should be three dots, click on those and you should get an option to edit all that stuff like title synopsis etc. With tags though, you add those at the end of each individual chapter in the add a tag section below the follow-up question.
Wow that is hidden, thanks a bunch. To Chyoa staff if you're reading: Why not add an edit button when you're viewing the story as owner?
I guess that would be a useful addition. I think this hasn't been suggested in the Suggestions subforum before, so you might want to do that. (That way, it might not be overlooked when it comes to new features.) When I want to open an edit story page, I usually open the story map and replace the "map" in the address bar with "edit".
Another easy way of reaching the edit page I just discovered, just append "/edit" to the end of your story's link.
That works as well, though you have to be on the story page and not on the introduction chapter page. The pages look the same but appending edit to those links opens either the "edit story" or the "edit (introduction) chapter" page.