just disable auto-upload and then manually upload the ones you want to. There is a setting to share your immich library with someone else. Between those two features, you should get something close to what you want.
For me one of the killer things would be to click "share" on a photo I took, and then have the immich albums show up so I can put them in that specific place as like a 3 click process. That's basically what I was building my whole app around
