Hi and welcome Simba32
Itīs a long time since I took those exams.
First, make sure you click the the right button to take the exam, not the training. Do not remember exactly what it says on the buttons, but many of us has pressed the wrong one
Then, when you get radio messages telling you what to do, press the m button on your keyboard to read them. You need to set course, speed and depth as stated in those messages.
Keep at it and you will get the hang of it.