This is the scariest part but it is the same process of taking a bike tire off the rim: lift up one part of the cover then put a wedge under the lifted section to hold it up then continue around the frame lifting it up and holding it up with the blue picks. You’ll find that after you life the bottom you can wriggle free the rest by hand.
The 10 screws came out quickly using the IFIXIT.com magnetic screwdriver.