It's going to be very hard to study for an online course while on the beach or at an Internet cafe. I tried a few years ago to study for my pilots license. It was infact impossible. Read one line, look up and watch the goings on for 5 minutes, then go back and read the same line you just read because you forgot what is was. People watching in Negril is a full time job.

You'd be better off getting a room with wi-fi and bring the laptop down. Dedicate an hour or so in the morning before it gets too hot and stick to it. Do it even if you don't feel to we'll from the night before. Stick to it and it'll all work out.