Might I suggest using syncthing instead? Never broke once for me and have been using it for years. Not had a conflicts either, as you can choose wether that happens or not in syncthing.

I recently discovered Obsidian - I use sync.com (free) and save my obsidian vault on my shared sync drive. Works like a charm, I can have it open on multiple devices.

There are plenty of Nextcloud hostings:

https://www.hetzner.com/storage/storage-share/ https://tab.digital/ https://thegood.cloud/

https://github.com/nextcloud/providers#providers