They are amazing! Just keep sketching and maybe try painting a few.
Your drawing are pretty good but the thing that they miss is good solide anatomy. Also try drawing more edgy lines instead of wavy ones. This really helps with the constrution. And lastly learn anatomy. You probaby heard this already but this helps soo much. And don't forget to practice a lot!
Your proportions are litle bit off the pose is still stiff and they are pretty dark but ovrall very good
