Welcome to the Guild GreyOne! Sounds like you have some first hand knowledge that will serve you well as you learn the ropes of digital (or hand drawn) cartography. The best place to start would be the Tutorials section of course. There are loads of helpful walk-through's on hand drawn mapping as well as mapping with various forms of software. So spend some time getting to know what's out there and once you've found some things of interest, begin a Work In Progress thread to show the progression of your map. This will enable others to provide early feedback and constructive criticism to help you refine your skill.