Which First Cardio Or Pilates Yoga, Pilates, Kickboxing?

Yoga, pilates, kickboxing? - which first cardio or pilates

I am a girl of fourteen years, average weight and you want more comfort. I feel like I gain weight. I'm not much, and I am changing my lifestyle. somerthing want to enter, play sports, and I need something good for me. Please answer all my questions

1. Can anyone me some background information about three of them? they are good, (weight loss, flexibility, strength), and what you do in these classes? (the more the better)
2. Are there those you want to recommend?
3. could do all three?
4. or should I go ahead with one or two early? If so, which two?
5.could I go to the gym for all this?

By the way, if in the end, I yoga, pilates and kickboxing, no, I have heart and my diet.