JV,

First, you'll need to remove the door from the range, put a pad on a table, and set the door assembly on the pad, handle facing down.

Have a vaccuum handy to clean up all the glass .

You,ll need to partially dismantle the door to access the window pack,
Remove the 2 top screws and washers, try not to dislodge or loose the 2 spacers from the screws on the door interior, remove the screws on the underside of the door, holding the outer door bottom trim to the liner, and carefully lift the inner door liner from the frame assembly. You should be OK from there.

The door seal is going to be a lot easier, The gasket in secured to the door liner by spring clips, once you get the ends out of the openings in the liner, you can tug the seal clips out of the liner, insert the clips and ends back into the liner and reinstall the door on the range.

You'll do fine.

Good Luck
:) :) :)