Don't expect to learn something new from me. Starting with poor (but still good) Lumix FZ5, I managed to get few of my images accepted. It was kind of "oh, ok, I can do it..." events, after which i lost interest in microstock. But I haven't lost my interest for photography. My new gear is Olympus E-510.
It took quite a long time to get used to it. I even thought that I mastered operating SLR camera, but I was so wrong. I bought books from my favorite exemplars, Peterson, Miotke, Freeman... shooting like a crazy, and something was always missing. My decision to try microstock selling is very welcome. I am still photographic baby here amongst photo masters. But now I look at this site from different angle and with more "creative exposure". It is never to late to start over with new knowledge and skills, and also new challenges.
I already did some new gear investment, filters, tripod, lights, I joined local photo club, I shoot everyday, read books and web sites, there is some progress. But most valuable learning will be here, on Dreamstime. It is like examine after learning the lessons and doing practical work.
If your get rejected you know exactly why.
If it takes time to be reviewed it surely means quality of review.
If you learn from mistake you can resubmit.
If you listen you can improve your skills, you can fight for something.
I see Dreamstime as very balanced site, the team behind understand their contributors as they understand their customers, so the selling chance is optimal. I will not mention names, but there are sites where you can submit everything you want, almost all is accepted, but you don't sell. On the other hand there is a site when you get accepted only one out of same forty images, which is frustrating and discouraging, not to mention revenue for such an effort.
So, I feel the most balance here.
So if you are beginner even more then me, here is a piece of advice: Stuck to this site! You will have good learning curve, you will "see" what you are doing right and wrong, you will improve. And your improvement will be visible in your portfolio.
If you are living from stock photography you don't need my advice. I just want to encourage all photo enthusiasts not to give up, because on Dreamstime - results are measurable. You CAN enjoy here for sure. Keep clicking.
I really believe that I will improve my work. I am not depressed for poor results so far. It is insignificant. I always follow the rule that you need to give something before you can get something back. And that always worked at a glance.