[[A thought might be to erase everything and install linux first. Then win10 can live there as a big file accessed by virtual box under linux.]]
I thought about that, but then apparently I’d run into windows corruptign the grub boot of linux- and I’m not linux savvy enough to know how to fix the grub bootloader- I had wanted to go this route- but it looks pretty complicated- I would love to have linux as main os- this would be ideal- if it wasn’t so complicated, I’ts the route I’d prefer
Install Windows and then Linux. Linux will handle the boot management.