How Do I Put My Photos on a NAS and Keep Them Organized?
Fix the dates and the folder structure on your computer first. A NAS will index whatever you give it, mess included.
A NAS indexes what it is given. Copy across a folder where every photo is dated today and named IMG_0001, and that is the library you will live with.
Get it right once, on your computer, where a mistake is easy to undo. Real dates inside the files, sensible filenames, and a folder tree by year and month.
Takeout JSON Metadata Fixer does the dates, the names and the folders in one run, and shows a preview before it moves anything. It runs on your own computer and is free for your first 500 photos.