Eyes need to be wider.
Drop the nose line down a pixel and darken it.
Males should be widest at the shoulders, not the forearms.
Arms need to be longer.
Lower legs are often smaller around than thighs.
The arms and legs are lacking in shape.
For a first pixel, this isn't horrible. Keep practicing. Study the art and anatomy basics and you will improve rapidly.
Edit: Ugh, I realized I sound too much like I know what I'm talking about. I don't claim any expertise. I'm just a beginner, like you. But I hope this helps.
Tourist