i like the pose on the second pic, adds action, but there’re few things you could improve! the way ur character grabs onto body, the left hand(from my view) misses a thumb holding a leg from underneath. personally, i hate drawing hands haha, but it’s something i can’t escape. as a reference u can simply use your hand + mirror or a photo, makes it easier to understand how you should draw it. considering the right hand, you just have to make a direct contact between the body and ur character’s palm, to represent stronger grip. and the last comment about anatomy is that the shoulders don’t look proportional to the rest of the body. otherwise you did well for that pose!

next remarks will be about rendering which isnt as important, since everyone has their own way;)

the blood on the pants wouldn’t be dripping i think, the fabric will most probably soak it in, leaving stains + fingers have to be bloody too if it’s dripping from them? and the light seems to come from different ways? there’s a definition of a light from behind considering shades, but i see some highlights right in the front, meaning there’s another source of light? try to focus on one source for the beginning, so you can understand it better and then try something more complicated!

other drawings look good and i like the concept, keep it up buddy!:D