Not sure if I’m the right person to answer this… I just scribble something and then make a kajillion tweaks until everything looks alright. Free transform (select area -> ctrl+t) in Photoshop is my best friend :)

I can’t draw natural poses in that smooth & intuitive way many pros do, but I’m quick to detect the flaws in my drawing and then proceed to fix them. I guess everyone’s got their own way of doing it