Hey @mikecaƱas I think you did a great job of getting a sense of personality in the characters and each of them really comes through. Nice work!
I would agree with @Kristin-Wauson about values. I think it might help to spend some time messing around with big value shapes. What I mean by that is are there ways you can group things into bigger value clumps?
I feel like what's happening right now is that you have a really great sense of detail and the small things like the character's expressions and conveying their personality through their pose, props, etc. working, but the big picture is kind of falling apart because the big shapes aren't leading the eye.
I don't know if that totally makes sense, it's hard to convey just writing, but to me that's where you would get the biggest gains in making this a stronger picture.