Relax dude. There's a lot to read here every day and we can't get to em all quickly. For the first question, scan in the pencil drawing and then adjust the contrast, or levels, or curves to darken it up to make a proper brush (grayscale brushes function with black being solid, white being transparent, and grays being in between). So use the above three methods (contrast, curves, or levels) until you get something that you are happy with. To make a brush set, open the Preset Manager, then ctrl+click on the brushes that you want to put into a set, then click "save set", and give the set a name.

As for the map, I think it looks fine except the rips are too straight and too many. I'd make some of them smaller and more wiggly or irregular. I'm not sure that the StarRaven trees fit with the Ramah mountains, but that's just an opinion and it's not too bad really. Pretty good job, though.