I'm trying to use Google Photos but find it hard to manage albums. Like I have a few thousand photos, I want to find all the ones that I didn't assign to albums

I'm trying to use Google Photos but find it hard to manage albums. Like I have a few thousand photos, I want to find all the ones that I didn't assign to albums yet. Doesn't seem like there's a way to do so. I also want to press one shortcut key to put a photo into a certain album and at the same time archive it. As it is, it takes several buttons and a mouse selection and a mouse click (with some delay in between), which is super painful when you have to repeat it thousands of times. Edit: Hmm, I saw there's Google Photos API. If it's easy(ish) to use, could I possibly write some small python or JS scripts to get this functionality? Or is there a reason this isn't as simple as it sounds?