Does this run on x86/64 bit systems? Or this is for Linux smartphones more.

Just a quick thought. These days you can create a special partition in the first part of your drive and just boot from it. No grub, no config really. You might want to take a look at EFI and an EFI system partition perhaps?

+1 for Organic Maps. Create an open streetmap account and contribute - its a game changer for me. Instead of a consumer, you’re a contributor. (That goes for all OSM ofc)