That’ll make it about a hundred times easier I’d say 
That’s a very good start 
Have you managed to install twrp? The Installing or upgrading TWRP using adb and fastboot section should help you. Please be sure to use the 3.2.3.0 version of TWRP, and not not restart in the system after flashing the image. This flashing is the most important step, so could you explain exactly what you’re not managing?