Relatively easy repair. Shut off breaker, two screws (one on each side at midpoint) to pull oven 3/4 out from cabinet. To pull oven out open the door slightly and grip inside the oven. Used two stacked 2x6 to hold the front up after pulling it out.
Metal cover full width of oven and 6" depth over wiring. Six or eight metal screws to remove including one on each side holding in a white disk. They come off together. Lift off the metal cover (mine hung on the bulged metal at one screw hole. Just pried out the cover very slightly to release it).
The fuse is right at the front. Use snips to cut the black and white plastic retainers. Unplug the wires on each end and plug in the new fuse. I just pressed it gently down into the snipped retainers.
Dont overtighten the metal screws when reinstalling the cover as they strip easily.