Which website did you upload them to? Especially with small agencies you might never have any significant sales, so it's best to upload to multiple bigger agencies as mentioned in the post above. More tips will be in the second part of the tutorial, since my laptop stopped working it will be another two weeks, but you can start now with registering at the different agencies linked above!
RE: Earning a Passive Income with Stock Photography: A Beginner's Guide. Part 1: Getting Started