Welcome to the Guild!
What kind of fiction do you write? Anything published?
Lots to do here, check out the Finished Map Forums as well as the WIP and Monthly Challenge boards - lots to see. If you don't have a specific graphics application to do your own mapping we have a Mapping Software thread in the General Forum. No doubt you'll want to check out the Tutorial Forum as a best place to begin your improvement in your art skills.
Again, welcome.
GP