I am a girl and I want to drive a bike

So as the title suggests, I am very close to buying a bike, but my parents are quite hesitant as they think I won't be able to handle/ride one. I wanted a bike since I was a small kid. Please help me with some tips and suggestions on what to do, What all I need to do to be able to ride a decent Harley Davidson 🥹 Edit: RIDE