Hi. First step: choose your best photo and upload. Wait 1 minute. Go to unfinished files and add a title, description, categories and press Submit. Wait 3-4-5 days to see if your photo was approved or rejected. Repeat this step as often as you can. The first money will come after 2-3 weeks or 2-3 month depending of how good are your photos. Good luck.
And don't forget to play Stock Rank, Is a game used for learning what stock photography means. Click on that wing with the number 77 from above my avatar (the golden crown) and play. Forget about making more points than me, I am the best here :)