sizing voltage regulator
This should not be an answer, but there was no other way to add a photo. 

You may not ask for product recommendations in EE SE, but since you're a new user I will help you with the right search terms, but I'll not indicate any product.

I agree with @Bimpelrekkie, this is not a job for a linear regulator, since the thermal dissipation would be critical. Try a switching regulator, which is a more modern solution.

Search for "3.3V Step-Down Voltage Regulator module", or "3.3V buck voltage converter module" and you will find ready to use modules like this:


If you need to build the converter yourself, do the same search without the word "module" and you'll find indications of IC's that could be used to build circuits like this.