Bookstack has a pretty robust API for things like adding/exporting content even if the UI doesn’t always have a way to do things.
Might be worth looking at this ready-made script and see if it serves your purpose (at the very least just to make your shift from BS a bit easier): https://gist.github.com/ssddanbrown/45acb913a7b873240b2d89781e74a7a4
When I installed fdroid from their website a month or two back it was like 2 or 3 clicks. Then whenever I want to install anything from there it’s an extra click or two over what it would be from Play.
I’ve seen people click through way more complicated processes than this without even knowing they did it. Modern computing has taught people to just keep hitting whatever the approval text is (yes windows, I really do want to copy all of these god damn files. Yes, really, I still do! Yep, again, ALL of them!)