Even though my island is bigger than yours, I had to do what you are asking. After 4 years of home schooling I never had a pip but always kept good records for the "just in case"
Ha, I looked at that site and forgot the trailing 3 zeros,
Anyways here in the USA all you need is a form and an agreement not to teach stupid. I bought the material from a certified home school company in Ohio for about $800 a year.
I homed my boy from 9th to 12th but then again I have a degree in both chemistry and electronics.
If you lived in Fond Du Lac Wisconsin I could tutor you, but alas all venues are different and must check your local board before preceding. Your area will have a home schooling network - some with an attorney (barrister) lawyer.
Perhaps another in the OZ area may shed some more light, but in the USA you can pull them and unteach the crap given by liberal arts french fry graduates.