Hi
I home educated my son from age 10 to 16. He's now at 6th form.
When he was struggling at school, being bullied and the school having no interest in addressing it, I googled 'home education' along with the county I live in - the search came up with a local group of home educators. I emailed and arranged to meet up with a family in person (that being before the pandemic) which was really useful. I think what I wanted most at that time was the reassurance that there would be other families, other kids his age, doing the same thing, and that they wouldn't all be weirdos! The family I met was lovely.
I also found www.educationotherwise.org useful - they have advise on the legalities of home educating and a template letter if you do decide to go ahead and de-register your son from school.
I did go ahead soon after meeting with the first home ed family, and many others locally were very helpful when we were finding our feet. Facebook is the platform that most home ed groups use, so its the easiest way to find others near you.
I think where our situation differs, is that my son was 10 and fairly compliant at that age (that did subsequently change - like it does for most kids) so I can see that starting home ed at age 10 could be a lot different to starting at age 14.
When we first started, we went out a lot, meeting up for informal groups as well as to exercise, but not many groups that were for formal learning (we did that on our own at home). In his teens, he started at face-to-face lessons for some subjects, but they switched to online groups because of the pandemic. They were with www.aweclub.co.uk . My son took GCSEs as a private candidate during the pandemic (which was a struggle to organise) and he's now at a 6th form studying A levels.
I've also met families who decided not to bother with exams but concentrate on gaining useful skills and work experience and go straight into applying for jobs. That seemed to work for them.
A 14 year old does need to be 'receiving a full time education' but that doesn't mean it has to look like what he'd been doing in school. The education otherwise website will have some information on what legally you would need to do to remain within the law.
Best of luck x