The nut is usually easy to remove. You have bent all 3 of the "legs" of the spider washer toward the rear of the boat to allow the nut to turn, right? A large screwdriver usually works for this.
A 2X4 from the zinc fin behind the prop to the "neck" of the outdrive will jam the prop safely, to allow you to loosen the prop nut.
After the nut is off, the spider washer is next, followed by the fitting that locks the spider's legs (this can be part of the prop or separate), then the prop itself, and lastly, the thrust hub.
Realistically, the prop will be the hardest to remove. Use a 2X4 to gently pry against the prop blades, one at a time, to work it off.
Post back when you get to this stage.
