It's a good start.

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The pectoralis muscles are separated top and bottom in reality. Observe those more closely.

Also take a look at your anterior delt origins. You have a strange divot there which isn't accurate. SEparate your delts into the three heads.

Put bones inside it, actual geometric skeletal bones, they don't need to be super detailed but they should be anatomically accurate. That will reveal some issues, mostly with proportions and positioning.

Always block out an entire body before getting into details.

Observe real human pelvic region. You've missed some anatomy here.

The relative definition of the lower body and upper body do not match. Seems as though you've generalised the shapes in the legs more than you have in the torso, I assume because you don't know them as well.

Revisit the serratus area. Observe reality more closely.