Be sure that you use a keyboard that will work during the restart. Sometimes (for various reasons) bluetooth keyboards will not work during a reboot. You may need a wired keyboard. If using a wired keyboard that is not a mac product, but a PC keyboard be sure to find out what buttons the command, control and etc. are assigned to on the PC keyboard.
I hope that this video will be able to help most of the viewers that watch it.
Steps for entering text into terminal below.
1st step: sudo
2nd step: Right click on Install Mac OS High Sierra installer. Show package Contents. Click Contents folder. Click Resources folder, drag and drop /”createinstallmedia/” in terminal.
3rd step: –Volume (hit spacebar) Drag and drop USB Drive in terminal.
4th step: Spacebar drag and drop MacOS High Sierra Installer to terminal. Press Enter (Return)
5th step: Enter your password for computer (It will not show it being entered) hit Enter (Return).
5th step: (y) hit y then Enter (Return).
Try copying and pasting text below in your terminal. Disclaimer this may, or may not work.
sudo /Applications/Install// macOS// High// Sierra.app/Contents/Resources/createinstallmedia –volume /Volumes/MyVolume /Applications/Install// macOS// High// Sierra.app
Take the opportunity to connect and share this video with your friends and family if you find it useful.