The problem with the air law exam is that we all take it very early on in our flying training. We have not yet got to grips with the abbreviations and acronyms of the flying world and the whole thing is still like a foreign language. Much of what we are studying is well beyond our actual flying experience and is therefore 'theoretical.'
How on earth, for example, can you expect a brand new student to understand the difference between VMC minima and licence minima, when all he has done is fly a few hours in very benign weather conditions.
Holloway:
Don't worry about it being difficult. Don't worry about not understanding much of what you study. Use the confuser and talk to your instructor to pass the exam. But afterwards, during the rest of your PPL training and over the following couple of years, keep coming back to air law points. Look them up again. You'll find they all start to make sense (well, most of the, at least). Following air law will keep you not only legal, but also safe!
However, I would not reccomend trying to read the ANO. There are several books which make a much better job of explaining law than the ANO itself.