Flickr doesn’t offer a true shared album in the same way some cloud photo services do, but it does support Flickr Groups. Each person would need their own Flickr account, then one person can create a group and invite the others to add photos to the group pool. That gives you a combined shared collection, with privacy options depending on how you set up the group.

For cleanup and curation, the most practical advice is to edit before uploading: remove blurry, accidental, and near-duplicate shots first, then share a smaller selection. With 2,000 images, viewers are unlikely to want to browse everything, and a tighter set of highlights is easier to organize and enjoy.

If you don’t need photography-specific features, Dropbox can also work as a simple shared repository and has basic gallery viewing. So: Flickr Groups if you want a photo-community-oriented solution, or Dropbox for a simpler shared folder approach. In any case, curate first and upload the best images rather than the entire dump.