hi,
better to check regulations again.
My instructor in Belgium told me one was not allowed to exercice instructor privileges before one has a CPL
Which means, you are not allowed to be paid to fly unless you have a commercial licence.
I would suggest the normal route of PPL-CPL/IR-ME before even thinking of being instructor.
Being an insturctor is about one topic : instructing people.
If you are only a low hour PPL you have to be a very good pilot if you want to give tuition, becouse people can do very funny things in airplanes (can be very scary if u'r not prepared).
enyway, good luck with the exams.
pete