Just a brief update: yes, I have completed my first draft! It's rough and raw but there from beginning to end.
I'm going to spend a day or two just going through and adding in a few bits I've realised are needed and just check all the days/weeks line up, but am feeling very relieved. It won't be the mad rush to get words on the page.
Hopefully will start the next one a bit early, and keep my head start for when I get bogged down.
Thanks for all the support.
Will post something actually informative and entertaining tomorrow.