Yo, good work all around man.
As for the profile image, right here:
As for gestures, I think your work looks fine. The idea is to capture the "pose" or "energy" of the reference, beyond that, there are few guidelines. It helps to look for the relative position of the spine and limbs, though it seems some with more experience go directly in 3D shapes of the overall body.
It's all about refining your observation skill though, so as long as you keep trying, it's alright.
Love the room, many (including myself) struggle with perspective, but you can easily tell the angle and most objects. There is clear intento to use lineart weight to enforce the perspective, and most proportions seem to fit in well, so overall it looks good.