What do you mean by shapeless? If you're talking about whether or not it feels like it has form, you've done a pretty good job. important parts to note is that the lines overlap in t-sections well enough giving an illusion of depth. You did a really nice job with the top plane of the body where the trapezius and collar bones form the top.
A few criticisms is that the hips area is where the illusion breaks down a bit since the perspective gets broken by the abdominal line sort of cutting down and it's unclear if how much the hips are rotating since you're showing a lot of the side of the hip that we probably wouldn't see.
Actually looking at what this anon has done, you can see that the hip is far more rotated so we can see the side of the hips more. Although he's drawn it in a much flatter perspective and not top down like yours. All in all pretty good job, keep doing gesture drawings, anatomy studies and keep grinding perspective if you have time.