Nextcloud app

Hello,

TL;DR : scroll until the list of need, here's just some context.

I really enjoy my kobo but I'm having a hard time with my sideloaded books. I share them on a server with some friend.
To access them I first tried calibre-web but it's kind of clunky and I can't have my mangas.

So recently I tried Koreader for the nextcloud compatibility. It worked well but I don't really enjoy using Koreader and I think it's over complicated for my need.

My next idea : why not create a thing my self ? I already create some python and curl app with nextcloud so I'm kind of used to it.

Thing is, I can't know where to begin and if I'll be able to do it.

Here's my needs:
- I want to be able to browse my nextcloud on kobo
- Then dl books or even folder of books
- New books appears on my nickel library

I think I can use Nickelmenu to launch a .sh to retrieve file list etc...
But I don't know how to print on screen, interact with the results

Any helps ?

Thanks