Well, you came to the right place to learn about mapping. There are quite a few CC mappers around here, so the best way to learn to use the software is to post a work in progress (WIP) in the appropriate forum and then wait for the hints and suggestions to come rolling in. And trust me, they will.
Most of the people here are quite willing to help if they can. Reading the WIP posts is also a good way to learn some of the tricks used to create maps.
So, Post a WIP early in the process and post often, and just watch your skills expand like you wouldn't believe.