How I learned stick back in the day (This is SFA3 era mind you) was basically do reps of common motions all the time. Of course I had no choice but to learn stick because all I did was play at the now nonexistent arcade near my house. Something good is play a FG with a training mode option that tells you your directions and use that to determine your motions. I'm not sure if MBAC has it, but if you have like a copy of any Street Figter after 2 they should have that option. I know GGAC also has it too. Soon, you can be a master of the stick.