Firstly, Welcome to The Guild, The Mappiest Place on the Web
Now that THAT is out of the way, You have come to the right place if you want to improve, or even gain, mapping techniques. Your dreams are actually closer than you think as our Tutorial forum is just jam packed with way to create maps of all sorts, using all kinds of progs and even some that are for Pen and Paper maps. Have a look through for a style you like and have at 'er. Once you start working on a map, post up a WIP (Work In Progress) thread here and you will get all sots of helpfull C&C. Don't be shy, or intimidated, because we are a freindly bunch here, and I am sure that some of those maps that impressed you are made by people that started right where you are now when THEY came to the Guild.
Have fun, enjoy your stay and I will be looking for you in the WIPS