I just completed this job and I am pretty pleased with both myself and the detail in this guide. As others have commented read the instructions very carefully every step of the way so you don’t damage any of these little tiny connectors! The camera and display main connector slide out sideways.
Regarding step 7 my experience was different than the procedure described. My fan ribbon cable was not glued down at all and the cable simply slid out of the socket towards the rear of the computer and the new one slid in.