Upgrading to sync from current setup

What I’m trying to do

Here is my current setup.

I am planning to upgrade to the paid sync feature to also add in my tablet and phone. I have previously synced my notes by keeping my vault on my nextcloud server, from where it gets backed up to onedrive nightly. I am just wondering if i can keep my setup like this while using the sync feature, or do i risk creating inconsistencies in the vault?

That should be safe, because the vault is only connected to OneDrive on 1 device.

Thank you for the reply!