Have you checked out the Recents or the Imports views?
The Library is just a list of all your stuff. At the public library they put the books in, maybe, Dewy Decimal order. You can't change that.But you never start at the beginning of the library and look through them all to find the one you want. You look it up in the card catalog, or the computer version of that.
In Photos, the Library view is the list of your pictures. They're in date order. They've even made it easy to scroll though years and months. Nicely, they've also included a Recent view, where they're ordered by upload date. And so on.
Most of us keep our picture in Albums. An Album is a catalog of pictures. I have an album for "19 04 21 Birthday" with all the pictures I took on my granddaughter's birthday that year. I also have an album "Martha" with all the pictures of her in it. Some of the pictures are in both, of course. But the albums are like card catalogs-- each is just a list of the pictures that fit that category. Even though a picture may be on the lists of two different albums, there is only one copy of the picture.
We also use "Smart Albums" with criteria like:
To get pictures in a date range. Or we might use "Person-is-Martha" and "Keyword-is-Birthday" to collect all of Martha's birthday pictures together. Or "Person-is-Martha" and "Keyword-is not-Birthday" to get the others.
By the way, adding keywords to pictures and using the Keyword Manager provides powerful search techniques-- way more ways to find pictures than the old card catalogs.