but without syncing is basically unusable, or can I access my texts from my pc and my cell for example?
If don't know how or can't be bothered, you can pay for Obsidian Sync - which Just Works.
I tried to roll my own syncing with syncthing and iCloud and Dropbox. In the end I spent so much time debugging and dealing with files clobbering each other mid-sync I figured out $4/month to support a project I use daily isn't too much.
Zero problems since and I use Obsidian regularly on 4 different devices.
For those that want to sync without paying, many use syncthing, though I don't think this is a feasible workaround for iOS users.
There are some other syncing methods that I haven't really looked into.
I use DriveSync on Android to sync selected Gdrive folder to my phone.
It works.