Well, I must say welcome to the Guild.
Most people here do`'t mind the borrowing of their works, but there are a few provisos on that.
First, read the first post where you find the maps. While most of the people here work off the creative Commons licence, we also have some pros who make their living off of their maps and are greacious enough to let us see the works in progress. If they mention that a map is copyrighted, please, PLEASE follow the proper ediquete dictated by the terms of the copyright.
Secondly, if you find a map that you like and use, I am sure that the creator of that map would appreciate being told that you liked it enough to use . And don,t forget to Rep the mapper as well
CC is a good prog that can create some decent maps very quickly, so I believe that it might be the sort of prop for you. you could work on a map in incriments and come back to it when the insperation/inclination strikes. And as someone who also uses a comp all day, I have found that the time mapping goes much faster than work