Maybe this guide is more your style?
https://www.tenforums.com/tutorials/1950-clean-install-windows-10-a.html
Go in to your BIOS
change boot order in BIOS so USB is first (hd is second)
boot from installer (on the USB drive)
follow the above guide (read it first and make sure you understand it)
when asked for licence, click "I don't have a key" and the install will continue and reactivate once finished
When asked to choose where to install win 10, the installer may have an error about GPT hard disks (this is just for very large drives), delete all the partitions & press next. If get an error, cancel the install and reboot your PC and re-start installation. It should not give an error on the 2nd attempt(most PCs won't need this 2nd attempt)