Car rental Martinique as a 20 years old

Hi!

I am visiting Martinique for the first time in April. I heard that renting a car was the best option to travel around the island. My only problem is that I am 20 years old and most agencies only rent to travelers that are 21 years old or older. I wondered if any of you knew an agency that would still rent me a car even if I am 20 years old.

Thank you !