Besides alex90 valuable tips, it might be worth spending some time at the school, taking to previous students and seeing how the environment is. Also, not all instructors are the same, and finding the right instructor is valuable for your journey. Also from my personal experience check how the availability of aircraft, instructors is like. And probably best would be to ask operation and students for feedback. And never pay all fees up front. And if you can, I would recommend going to some sunny part of the world, which would mean consistent flying and a license in a month instead spread over years; bad weather can put a spanner in the works. Also getting the ground school done before may help in actual flying.