Ollie,
OK, if you're half-english, then English shouldn't be a problem!
In order to get in before JAR, you should start the flying training as soon as possible - you only have a couple of weeks. Get a couple of hours in your log book.
There is no requirement to have formal tuition under JAR so starting the theory or groundschool before 1st July 2004 will not make any difference. It is very hard to prove that you were studying the theory.
Like Heliport, I would urge to take this instructor's comments with a pinch of salt. Every student is enthusiastic about helicopters; I was so much so that I bored my friends to tears
Personally, I don't know anyone who had needed groundschool tuition for PPL(H) - then again, I don't know many PPL(H)s - if you're reasonably bright, you'll pass them first time even studying from the books as long as you cover the syllabus.
Can you investigate being able to sit the exams in your mother tongue?
With regard to the training kits on the links you provided - they are OK but I would suggest getting your stuff piecemeal. Just buy a couple of books to get you going and, when you have some experience of flying, then you will be able to decide which of the items of equipment you would prefer.
Cheers
Whirlygig
... and the S300 is a great little helicopter to learn in - you'll have a ball!