@Mrsheartts hii luv <3 inspo for new chapters can come from other books, random prompts on pinterest, or even random dreams/daydreams i have hehe.
as for the hard to put into words thing, my advice is to simply write down everything you can about it! think about what’s happening; even if it’s horrid or sounds cheesy or you think it’s just not well written, you need to get the idea down so it’s out in front of you. i’ve written out an entire chapter, knowing it was worded weird and not how i wanted, then left it for a day and restarted all over again (kind of annoying) BUT the initial things i wrote gave me a guide to do it better! that’s my process, personally ;)