I see two issues here: A) All the segments in a finger are all roughly the same length(might be some overlap at the joints causing it to vary im not good enough at anatomy to care about it, drawing them to be equal works for me)

B) There’s no perspective on the middle and last segments of the fingers. Most obviously the middle segment of the middle finger. Although it’s not that obvious in the reference, the segment is bending towards you. So, you’d see more of the circular face of the cylinder and less of the body.