Everything you ask for is contained within the ArchWiki, and since Endeavour endeavors to assist the users in learning the ways of Arch, there is no better substitute. The Arch installation guide answers or contains links to every question you posited above.
ArchWiki: https://wiki.archlinux.org/
ArchLinux Installation Guide: https://wiki.archlinux.org/index.php/Installation_guide
Regards