14,073 votes and 340 comments so far on Reddit

The components of your cosplay look great! The costume’s great, the makeup’s great, and the hair, though black, is not too far off.
Definitely try a different pose/posture, though.
Here’s a good reference
His shoulders are thrown back, his head is down, his feet are planted wide with equal weight, and he’s openly facing dead at the camera with a wide open posture, as though challenging the viewer.
His body language conveys arrogance, power, and rage, not just in this photo, but constantly throughout the film.
Your body language in this particular photo conveys uncertainty; your shoulders are forward, you’re not level with the camera, your weight is on one leg, and your saber is closing off your body as though protecting yourself.
Try playing with your body language, and please share the results!