Looking good overall
A few things here that stand out to me if going for accuracy would be the head size being a bit small, his right arm and forearm are shortened and the tilt of the chest with the angle that forms with the abdomen on his right side are off
One thing that helps me a lot with that is to ghost the angles or straight strokes over the model before committing to a stroke on canvas. Like his right forearm, note how the angle is off and that leads to the placement of elbow and arm, so by doing the motion of the straight line that represents the forearm (just hovering over the model) that would help me place a line to better inform my construction of said forearm, the same with the outline of the chest vs abdomen, theres a notch or angle that forms there as he twists the chest a bit.
Another thing that helps is noticing the negative spaces. For example look at the negative space between forearm, arm and head and compare to your drawing, i frequently fond myself using that to doublecheck and if off - erase and redo
Keep at it! Cheers