Yeah, I don't blame you. Having to do that manually can get tedious 😅
This actually made me look up if there is some tool for that and apparently there is danbooru-local-image-tagger. Although the last commit was 5 years ago, so who knows if it even still works 🤔
I'll do the first 50 from top to bottom, left to right (with no guarantee). Starting with the main post:
There is a hentaisource-community if you or anyone wants the source on a specific image BTW.