Avoid UK CAA exams if you can.
That is an interesting point of view Capot, please explain.
For the OP, if you just want to pass the modules then the numerous websites offering mock exams is the way to go. Just practice the exams and eventually you will know all the questions/answers.
On the other hand, if you want to actually learn the subjects then courses and book study are the only way to do it properly.
Good luck.