If you do want to take the Archinstall route, you'll find that the new update adds a new screen to the process that lets you install a UEFI bootloader to a removable device, like a USB. 9to5Linux ...
Then there’s Arch Linux, which lies on the other end of the beginner-friendly spectrum. While it does have a learning curve ...
If you're trying to decide between two powerhouse Linux distributions, let's see if I can help you make the call.