Landmarks and generally better anatomy knowledge sound like excellent places to start. Then just loads of brute force practice is the #1 best method for me. By 2022 I'll have some convincing body builders haha.
I thought of this guy as a slave/prisoner in a labor camp that is learning to read and write and doing his best to write a letter. Most of my sketches have bizarre little stories.
@CarltonIsaac ahaha love the "Flex! Flex!"
@nathanKmcwilliams how cool! That sounds fun to draw.