OS install on the new PC went well enough. I was worried I borked something in the process because I’d just get a black screen on boot, but that was either my monitor or the joy of using HDMI. Unplugging and plugging the cable back in fixed it.

The other thing was i didn’t install the OS properly the first time. The computer didn’t know to boot from its own storage. The instructions there weren’t very clear. Second time around after the black screen issues got that sorted