Welcome to the Guild! I'm not immediately aware of a lot of Inkscape-specific tutorials but hopefully someone else can point out a couple. I use Illustrator, and that only occasionally for something specific (building outlines, labeling a map made in PS, etc.), so I don't have a great deal of experience in creating maps in it from start to finish...but I know there are a few vector masters hiding out on here somewhere. Looking forward to seeing your maps.
M