@ivancatamora15 those are super cool!! The first one inspired me so much, great reference
The second one, damn what a difficult pose hahah I never do this kind of stuff I think that the head should cover more the neck probably and keep attencion to the scapula and clavicle overall shape, I allowed myself to do this, hope that could help you
Waiting to see your progress with this character!!! and learn about his background story more