Eventually people will have to get new hardware. That’s the moment to avoid nVidia, that’s how simple this can be.
Also, the problem is nVidia giving shitty Wayland support, not Wayland providing no nVidia support. It’s nVidia who has to write the drivers since they themselves opted to keep their implementation details a secret. There’s nothing the Wayland people can do except plea, beg and shame. If nVidia then decide not to care, then I say fuck them.
I can see this meaning a number of different things:
you want to move your home directory to a separate partition: You can just create a new partition and move your stuff there. People have suggested rsync, and that’s fine. Personally, I’d use mc (midnight commander) for that because it’s easier.
you want to know how to transfer your future home partition to a future bigger drive: You could do as above, or you could use clonezilla for that.
you want to transfer files from your old Windows setup to your new Linux system: You can just mount an NTFS partition and do as described under point 1. I’d be wary to write to an NTFS partition, but reading from it works just fine.