Will my hands stop shaking if i stop masturbating?

Unrelated: Tremors have no relationship to sexual function or masturbation

No: The most common cause of a tremor is familial tremor; if this is you, your physician can help you with medication, for example propranolol. If you have Parkinson's or some other cause of tremor, this needs to be addressed. Enjoying your body isn't the cause and I'm sorry that someone told you something like this -- life's hard enough without superstition. Best wishes.