Instructions
ps. I take no responsibility if you use this and brick your machine or end up with issues.
Good place to start for formatting disks and getting the os installed with bios https://www.ostechnix.com/install-arch-linux-latest-version/
With UEFI https://www.tecmint.com/arch-linux-installation-and-configuration-guide/
Good info on getting the os to play nice with full screen https://wiki.archlinux.org/index.php/VirtualBox (Probably going to need to add a kernel parameter to get it working).
Basic partitioning without luks (using cfdisk)
EFI > 512M 600 is fine
SWAP = 2*RAM
ROOT ~ 10% Of total, at least 30G
HOME = remaining