Thanks for the replies ladies 
WW - I think the CM approach is very accessible, so I’m sure it would be a good one to ‘pick up and run with’ if you had to! I hope your little girl is happy whichever way you have to go.
Our eldest is only 3 1/2 so I’m not planning on ‘doing’ anything for some time yet, although we’ve taken on board some of the ideas from Ambleside Online in regards to books for little people. I’ve got the year 1 primer I’m going through, and putting aside books we’ll need, a few at a time, so I can get famililar with them first. Another of the good things about the CM philosophy is the almost unschooling way is goes about learning…I need a bit of a plan, a structure, to feel confident, but really love the unschooling ethos, so this feels like the right path for us!
Looking forward to hearing how you get on Diana! I see you have almost three years between your two little ones too, I’ve been thinking about how to combine the two ‘years’ when the time comes. I’m sure it will develop naturally though!
xx