lol one button FD is probably the most scubby thing ever, imo, to macro.
as for the SRK MOVEMENT (fuck yo numbers) just think of pressing forward before you do a 236. I know you like doing things the correct way but do this for now, then slowly just stop the last forward motion, and learn to "dig" into the gates bottom right corner, unless your stick does not have a square gate in which case GL. To learn on stick you really should have a square gate, as it makes feeling the corners a lot easier.
Try just walking forward and then doing the 23 then slowly turning that into a twitch motion.
EDIT: Sorry, I thought you said 623, which is understandable.... how the hell do you not know how to 236 on a stick lol. Hold it like a wineglass, I use it between my pointer and middle, alot use it between index and middle. There is a vid of the way diago holds his stick somewhere, and a thread on another forum about how to hold your stick and get used to it coming from pad.