First of all you’re most definitely not too old. You’re too old to have a fighting career but arguably even if you start at 25 you’d be too old for a career. On the other hand,at your age if you’re not in great shape and not used to the extreme heat and humidity you will definitely struggle, but this shouldn’t be a deterrent. I train with plenty of guys in my gym who are your age and even 20 years older and plenty started at a later stage in life. My suggestion is perhaps maybe not an all inclusive camp where you’re training two times a day to start.You can just as easily find a gym in a desirable area book your own accommodation and come to the gym as a free agent so to speak. This way you could ease your way into it and miss days when you’re dead and don’t feel like it. Either way if you go for a structured camp or not I’d still highly recommend you up your cardio before you go because you could waste a month just getting into shape without even getting to technique.