Ok you need to remove the door to refit the glass on this.
Open the door and then look at the hinges.
On some you may see a round disc with a slot in it. If so use a screwdriver and turn the disc so it locks the hinge in.
If there isnt a round disc then look at the hinge were it goes into the oven frame and theres a U clip on there. You need to lift this up on both sides. It may be very tight so use a screwdriver to lever it up.
Once the hinges are locked in then go to close the door and the door will lift off.
Once you have the door off look at the bottom and theres a metal bar going across.
Theres 2 screws holding this on so remove them.
Once thats off then fit the door handel into place.
Then slide the door glass under the handle and then you can fit the bottom bar back on and this holds the outer door glass into place.
Try that and you should be able to sort it from there.