There's no such thing as Raspbian Pixel, it was Renamed to Raspbian Desktop (RPD).
Start by running it from the *.ISO (or bootable CD-ROM) in a Oracle Virtualbox then you can explore what it does and how the installer works.
Then read up on From Windows to DebIan
as that's what X86 RPD is built on.
Microprocessor, Raspberry Pi & Arduino Hacker
Mainframe database troubleshooter
2012-18: 1B*5, 2B*2, B+, A+, Z, ZW, 3B*3, 3B+
Please post ALL technical questions on the forum. Do not send private messages.