order of exams
The order you do the exams might not matter that much, but to get the most out of your training I would say have a good read through/study all of the aircraft technical and principles of flight exam. Checking suction = between 3 and 5, ammeter = charging etc, isnt much use if you don't know what they do! I got through quite a few hours before learning the function of these instruments and what they indicate. Knowing what to look for obviously helps learning, worth considering when you check the hourly training rates. So if I knew sooner, I would have done technical exam earlier. But that's just my opinion...