I just remb one thing... When i looked at fellow new STOCK Photographer's submission, i realised that they are taking their usual approach as a Guy with Cam (GWC) - Sharpening, correcting, enhancing... This is a serious mistakes! In addition, do not post process your picture!!! (Do not add dodging, vignetting, halo, etc).
You shld never do the above. Over enhancing your pictures introduces noise artifacts into what could have been a potential picture sale. If there is any enhancing done, your client would do it themselves (most of them are expert in Graphic Design).
This is a reason why being a STOCK photographer pushes u to become a better photographer.