Hello AramiteCane
I took my three childremn out of school aged 13, 11 and 8.
Youngest one is now just off to FE College to do an A level equivelant course, so have HE three through teenage years.
Definately not too late.
There are lots of ways home educators approach qualifications.
Some do GCSEs by distance learning packages a few at a time over a number of years.
Some download the curriculum from the AQA site, work through it and then enter as an external candidate (finding a place to do that is sometimes the tricky bit)
Some wait until the children are 16 and then do them at FE college (which is what my eldest did, then went on and did A levels at another FE college)
Some don't do them at all (my middle child got herself loads of working and life experiences and got herself a job on the back of that)
and others use the OU instead-this is what my youngest daughter did and increasingly I am hearing of more home ed youngsters going this way. My daughter did her first OU starter course aged 15. The OU are quite used to getting enquiries from HE families now I believe.
There is a emailsupport lists for home educators interested in ways of doing GCSEs etc
There are a couple of websites to give you general info about HE and some good books about it too.
There are a threads covering these basics that I'll bump up for you, save me rewriting everything.
Does that help?