can I host my own cloud for privacy reasons?
You can host your own Joplin Server, NextCloud or pretty much any WebDAV server if you want.
Thank you. Would you be so kind as to link to some documentation on how to do this? ty
The readme within the Joplin-Server package has instructions - there is other information floating around the forums for any specific issues relating to it:
As for NextCloud or WebDav stuff it is a bit outside of the scope of this forum and things are pretty dependent on exactly how you want to deploy them - for example there is a pre-configured version of NextCloud designed to run straight on an RPi - NextCloudPi – Own your bits.
So far as Joplin is concerned there is no difference for a locally hosted NextCloud or WebDAV server compared to one you have hosted remotely.
If your only issue is security and privacy, Joplin does feature e2ee - About End-To-End Encryption (E2EE) | Joplin