Welcome! Good luck!

For ages I ran two SSDs.

One had Linux one had windows.

The reason is windows like to over write the bootloader when it updates (or did)

So for me… I had the Linux SSD as the primary boot device and I had to select the windows device in grub to boot windows.

It worked for ages and ages until I realized I wasn’t using windows anymore.

Edit: I ran a 1060 Nvidia on Ubuntu / Manjaro / arch / Debian

I never had an issue. Tho I use kde because waaaaay back in the day it was the only DE that wouldn’t screen tear.

Edit 2: I wouldn’t move your windows drive… just add a second one