Hello, khoatudiep. Hey, this is great, friend! Great job on your poses here.
Well, if I could and would provide you a suggestion, it would be, that if you're new here, why don't you please have a go at this link to an interative drawing tutorial here on this website?:https://line-of-action.com/learn-to-draw
The reason why you would, could and should do this link is because, the fast and faster ones will completely warm you up in the beginning, while the longer ones will help you out greatly on your final products. My hat's off to you, and I hope you've found this completely and totally conducive to creativity and significant.
wow. your gestural sketches are brilliant. honestly my current goal is to reach that level of rendering. although the two images with more detail to me seemed too dark? like i don't know how to explain. the man with the axe is too contrasting? black n white ilke extreme color difference despite being the same person? i feel like