There are national groups run by charities or experienced home educators that have a wealth of information on how to get started, what to expect from the Local Authority etc. and are a good place to discover the ins and outs.
https://www.home-education.org.uk/
There are also national Facebook groups that are worth connecting with for advice, support and to keep up with anything that might affect home educators from a national/legal perspective, here are some popular ones:
Home Education For All (HEFA) UK Facebook Page
Home Education UK Facebook Page
Home Schooling/Education UK Facebook Page
Twinkl Home Educators Facebook Page
We highly recommend that you also join the local groups on Facebook:
Isle of Wight Home Education Facebook Page
Isle of Wight Learning Zone Facebook Page
These are public groups that you can join to find out more, even if you’re not yet home educating. Once you are a bonafide home educator(!) both public groups have a private, sister group that you can join – see the featured/pinned posts in each to find out how.
If you are an Island tutor or activity provider, or searching for either, you can post here:
Vectis Home Education Advertising and Selling Facebook Page