Play poker for a living? Doubt it. A great hobby to have though.

[sobefuddled]

You need to be doing this part time and working for a living. (I admit confusion here. How can you be on a division 1 tennis scholarship and still need to make a living?)
You cannot be afraid to lose.
You must be confident in your own strategies.
You've got to be quick at figuring odds and quicker at recognizing patterns.
You must love strategy games as has been pointed out by Dynasty.
Finally, you must leave all your winnings in your bankroll until you can play at the level that feels right to you. Bankroll and living money must always be separate.
Get rigorous physical exercise. In other words, play tennis too. Precisely because poker is a cerebral game you can't be at the top unless you maintain a healthy lifestyle.
Finally you must absolutely be honest with yourself. "To thine own self be true," said the bard. You should not be asking US what kind of person you need to become. You should be asking yourself, "Who am I?" What do I do well. What do I enjoy. Where are my passions? You can't just decide to play poker for a living. It doesn't work that way. You need to be passionate about the game. I hear that in Dynasty's story about Vegas (which I really enjoyed) and I hear it from my son who is a pro. Without that passion poker can at best be just another pass time or hobby for you. Honestly? The same is true of any profession. You must be passionate about your lifestyle in all its components.
I'm a lousy poker player but it's a great deal of fun. So I play. I'm trying to learn but I never played the game at all until after my son graduated from college. I understand why he likes it-actually is passionate about it-and I could never, ever make a living at it the way he does. I understand that because I know myself. So-get thee to a mirror and ask yourself those questions. Remember to be honest. The only person listening to your answers is you.