Awesome work. It's good to see you coming out of the shadows! And with such beautiful maps. I love the style - looks hand-drawn (of course) without looking messy/rushed. If you ever want to dabble with the computer, you could try just finding a good image or texture of parchment, place the images on top, and set to multiply. That'll hide the white without having to actually remove it, and it'll add a little "color" without having to actually color anything.
Hope to see more!