Okay wow I should have asked more questions. Sorry I didnt realize you came from that setup. Yes you would use that instead. You would simply run erase all partitions after placing the shield back into the bootloader menu then shield root. but if you are satisfied with lineage you can just leave it and I can wait on someone else cause lineage is a lot of work to install.Do I use that in place of lineage-OS.zip? Do I start over from the beginning of your video?
You can send through adb
adb reboot bootloader