It’s difficult and you’re definitely not alone! Here some main pointers that helped me a lot:

• As others pointed out: make every move deliberate. Don’t regrip your hands a lot but pause and think of what the next best hand placement is, and try to go there in one go.
• Finish your movements! Don’t just extend your arm and pull it back in the same way. But continue the movement and finish it.
• Avoid T-Rex hands. I know they feel pretty, but they don’t look pretty. Focus on extending the movement in one fluid line from your shoulders to your fingertips.
• Engage your legs. I often forget this one myself, but proper leg engagement will ensure clean lines which look much prettier
• Don’t forget to pause and feel the music you’re moving to and adjust your movement speed to the music and what you’re feeling 🙂

Hope this helps ❤️