Pixel8proandroid downloaded several bootloader's
Uh what?
want to buy a PC and give Billy Gates my money.
You don't have to use MS, you can use Linux. Officially supported Debian, Ubuntu and Linux Mint versions can be found in the Install instructions.
Web install is pretty easy to follow and very unlikely to go wrong. If a tutorial is needed/reassures you, then the only one thats probably needed is Side of Burrito's(please be aware, some tutorials will say to enable USB debugging, this is incorrect and unnecessary).
If any problems are encountered, then members of the GOS team/community can be reached on the Matrix or Discord channels.