I still haven't definitely worked out my goal, but I think I'll aim for 300 words per day for a total of 9000 at the end of the month. As I'm not writing in my first language, I'm missing quite a lot of the vocabulary I want to use, or I know the word but need to check spelling or what the plural is. Welsh has an astonishing number of ways of forming plurals so you can't really guess.
I speeded up a lot when the characters started talking. I'm a fairly fluent Welsh speaker, but for the narrative you need a more formal register, and that's what I need to practise.