I've been getting all the placeholder sprites into ren'py (the engine I'm using to make the game) and matching them to their dialogue. I'm also editing what I've written as I do this - the first of many editing phases. I'm doing the work that has to be done to finish a game - mostly testing and editing and tuning.
I'm not a programmer, so even simple things like making their swappable assets (like facial expressions) display correctly takes me a while. making sure I do it in a way that won't cause problems down the road or inefficiency is even trickier. but most of the parts that are hardest for me are done. I think.