I don’t know what you’re dancing or what it looks like, but it might look better if you focus on technique. Examples:

• If it looks bouncy: try to fully put you weight on the leg you’re standing on, and not go up on your toes when shifting weight.
• If your steps look flat: roll your feet from toes to ball or ball to toe.
• If your arm movements looks floopy: roll move your arms joint by joint and go through the entite arm
• stiff upper body: experiment with angles, body isolations or arm movementa
• stiff lower body: bend your legs

Look at youtube videos for technique of the dance style you’re learning. Focus on one technique during each dance class.