Well, first things first... Welcome to the Guild.
Second, and first suggestion, is to check out the Tutorial forum for ways to get things done with many different programs. Hand drawn too. Check out the software section for descriptions of the various progs out there.
Third, If money is a factor, I would suggest getting both Gimp (for rendering stuff) and Inkscape for the line art and texting. The advantage that both of these progs have for the fiscally challenged is the they are FREE!!! that always fits the budget
Fourth, Post the maps as you are working on them so we can give pointers and or praise as requires
Have fun mapping what the Mind sees!