Play the one you like playing. Both are good.
At my rating, should I play the Caro-Kann or 1. e4 e5

Hi!
Caro Kann is an excelent opening. But normally I would recommend to learn 1...e5 first at your level. If you would like to know more about openings for beginners, you might check out my post: https://www.chess.com/blog/maafernan/openings-for-beginners
Good luck!
1. e4 e5 gives White more options but I heard it improves my chess.