I thought after 6 years using photoshop I may have developed some skills, so I attempted to draw something (not just sketch it) for the first time. Drawing the lines was easier than I expected, although I'm still unable to do anything complex and it took around an hour of trial and error. Wow. I can't say I'm proud but HEY, IT DOESN'T SUCK AS MUCH AS I ACTUALLY EXPECTED.
Used my tablet, as I always have. PS flters were really handy.
That's how it went, step by step. Too bad I didn't save before finishing the initial sketch.