I have started to compile a list of what I think needs to be part of this project. There's the obvious (moat, walls, keep, etc...) and then there's the more detailed. To be honest, I learned quite a bit when I took a look online as to what a castle might include. I've looked at a few dozen websites on the matter, and I've provided links to the best ones below.
What I think I need to include in my project (so far): Moat, Guardhouse, Drawbridge, Training Grounds (+ courtyard), Kitchen, Dungeons, Great Hall, Armory, Well, Stables, Chapel, Workshops, Machicoulis, Portcullis, Arrow Slits and Murder Holes, Spire, Outer Walls and Inner Walls, *Tournament Grounds?*, Storage, Residences (for nobles?), Cleaning staff quarters, Library, study (and I might do a sorcerer's study as well), King's Quarters, Balcony, Siege Workshops.
What Is A Castle
SO, I also bought some brown(ish) paper today from the art store, as well as a artist's pen, so I'll have the media to do this on. The paper is light enough to draw on, but avoids the white-as-a-ghost look. Sadly, the art store didn't seem to have paper that looked old without words already on it. The first step for the project will be drawing the border, and I think the border of one of the maps linked above is similar to what I'm going for - simple lines, with fancy designs located at the corners.
I will work on the border tomorrow, and update everyone as I go!