How do you manage to update the metadata of your photos in Flickr or Unsplash like platforms?

After trying out a lot of platforms including glass.photo and other platforms to share and host my photos, I m settling on Flickr.com with a pro plan, but now I have a backlog of 4 years of photos that needs to be uploaded. While I try to upload few photos every week, the struggle to upload photos and then update the title, description, tags on each of them seems super tiring and non creative(for updating tags). Is there any tools or setups that you use for this. I tried to generate some tags by sharing my photos to AI but I not super happy with this.