To ‘edit‘ your photos means to ‘bring forth’ (your best photos), from Latin ‘edo‘. To edit is also from the French (editer) which literally means ‘to publish’.

A simple workflow:

1. Look at all your photos as small thumbnails
2. Flag or select/pick/favorite your favorite photos based on small thumbnails
3. If you see a photo which interests you when you’re looking at them as contact sheets (small thumbnails), *THEN* inspect the photos full-screen
4. Choose all your favorited photos, and export them to Dropbox.

I say just use Apple Photos. The simpler software, compared with Adobe Lightroom. Also, better sync with iCloud between all your Apple devices.