I'm sure there is a walk through, i can't find it at the moment. I did it about a month ago to mine.
All I needed was WD40, some plastic body panel tools and a Torx T25 and a spare pair of hands came in handy too. It took me about 3hrs I think. but that was at the same time as the discs and pads were being changed too.
Remove back wheel, and then unscrew the torx screws that hold the wheel arch in. (I undid as many as I could to just bend it out the way so I could unscrew the torx for that side of the bumper.
Rinse and repeat for the other side.(I had both sides on axel stands for this.
Spray WD40 around the edges of the bumper left to penitrate for a moment and then start from the corner and using the body panel tools unpop the bumper from one side and then the other. In my case I could see very clearly which vent was damaged as it was hanging out of it's space. clip in the new vent and pop off the bumper to the other side. For me this was a pig to get out so could have left it in... but for piece of mind replaced both for new vents.
put back all torx and clips for bumper and check alignment.
put back all torx for wheel arch liner
put wheels back on... Job done!