For background, I have studied A-levels, and had some university education, however, not in this field. At primary school, I was very gifted in Maths, to such an extent that at age 8 I was studying at a secondary school level. However, when I changed primary schools, they refused to stream and put me back at the same level as all the other 8 year olds- at this point I simply switched off to maths. I never made a fuss about it, I simply didn't put in any effort. I'll put some more background in a comment or this will be a very long post!
I'm now seriously considering training to be a maths teacher- but of course I have no relevant qualifications beyond GCSE. It doesn't seem possible to do any kind of access to this without a maths A-level (although if anyone knows a way- please do tell me!) and trying to find places to study it online seem to charge huge amounts, so I'm considering teaching myself- but I haven't a clue where to start with material etc.
Am I expecting too much? What if I'm no longer as capable as I was? How on earth will I manage the study? argh...