Welcome to the Guild, home to all things mappy
I have to tell you that the computer is THE great equalizer for a supossed lack of talent. Being a computer pro such as you are, you should have no problem getting the hang of yje programs used to make maps.
If you have yet to decide on what prog you want to use there is the Software forumn to help you make a choice in that regard. I would suggest looking at the various forums to find styles youlike and what progs they used to make them and use that as a guideline for making your selection. We have a forum just full to the brim with tutorials for many progs and on even more subjects. We also have forums where people display their Works in Progress and show off their Finished Maps. For true inspiration you need to check out the Cartographer's Choice forum as well.
Look around and see what you like, and don't be afraid to show what you got be it maps, techniques or even (or especially) C & C. We are quite the friendly bunch here so don't be afraid of getting your head bitten off for stating that some thing does't work for you. Just be polite about it and maybe say why.
See you in the WIPs