I’m not an anatomy expert, but I decided to model a human. I know I can do better if I sculpt, but I don’t have a drawing tablet and re-topology looks painful.
You need a reference. There’s no indication of any shoulders or wrists. That should solve the problem.
You can use a reference as background image, front and side view aligned
There’s a lot of them googling:
And use a reference for the edges e.g.:
