Hi! (no question is silly)
I don't really have a template for this, but it kind of depends on the format of the multi-chapter you're working on! Usually I decide on the overall plot and the sequence of events before I even split them into chapters.
For example, for Pieces - I needed to have Y/N let her guard down a little (so a few events to show her Jay is trustworthy etc.) then slowly getting closer, getting tgt and things they go through together as a couple.
Usually I only decide where to end the chapter while I'm actually writing. So you should write the story based on the plot and what you want to lead up to!
Those who followed my series fics will tell you i have a thing for cliffhangers (oops) so that's an idea you can have later on when you're actually writing out the chapters.
Hope this was helpful! If you need more specific advice, please feel free to hit up my DMs!