Nobody I know who has studied Chinese or Arabic, no matter how useful it was, ever called it "fun". You're going to be a doctor, you're in the middle of Florida...Spanish is going to hit the sweet spot of useful and fun.
"you need Spanish to pick up hot Latinas in Florida". Yes, you will get by without it, yes, a lot of hot Latinas will speak to you in English, and then they will turn and confer with their hot Latina friends, and you will have no idea what they are saying. This is not ideal.