Which camera do i bring?

I'm a 15 years old Beginner photographer and i want to get my own first Professional camera. Which one i bring, nikon or canon and can anyone advice me with a good camera that he know please?

Added (1). My package is from 500 to 800$

I suggest that you learn a bit about photography before contemplating a 'professional' camera. You would not get such, anyway, at the price you quote.

You need a camera that's going to be a high quality teaching tool that will be a good "jumping off point" to more capable equipment later on if you decide to pursue photography as more than an occasional hobby. My suggestion would be a Nikon D3100, it has very good image quality with a very easy to use interface for beginners, w/ plenty of help screens available to guide you to getting the results you want while also letting you have a great amount of manual control as well when you feel ready to experiment "on your own".It's well w/in your price range with a kit lens included. Later on it will accept many of the other Nikon lenses that are available when you've mastered the skills you'll need to justify their expense.