You start with putting pencil on paper. This artist SimzArt actually inspired me to try learning art a few years ago, but i didnt really start to put any effort into it until just this past year. Its a skill like any other that can be learned it just takes time and dedication.

Before i started to really dedicate time to study and practice, my "art" was so bad. I basically started at level 0 i could barely even draw a convincing stick man.