Welcome to the Guild Chris! You have come to the right place to hone those skills. When I first came here I had not so much as ever used a graphics program, and remember being both blown away with the quality of artwrok featured at the Guild, and intimidated. However this is a very helpful and friendly community and after spending quite a bit of time messing around with various tutorials, I eventually gained enough confidence to create my own map. It turned out better than I would have thought possible at the time. So definitely get to know the tutorials section. I'd also recommend starting a WIP thread once you begin work on a map. This is a good way to generate constructive criticism early on, and to learn new tips and tricks to mapmaking from more experienced Guild members.