But why are you doing it on google docs at all? Do it on an actual word processor locally. That won’t crash.
I don’t have any word processor on my laptop except for WordPad and I don’t really understand how to split the document into pages. I’m used to Docs layout and how it works.
Just get word/pages if you’re on a mac. Or libre office. Or open Office. Or any other free word processor. They all work the same and have the same layout for simple writing (I assume you’re not doing advanced layout for print - if you are you need indesign anyway, google docs won’t work).