https://www.skillshare.com/classes/photography/Photoshop-Basic-2-Image-Evaluation/780999134

It’s important to train yourself on what you should look for in an image. If you really want to become proficient with Photoshop, you first have to learn how to see. You need to change your focus. Learning how to notice the fine details is critical to success. Having a great photographer’s eye is not the same as a great retoucher’s eye.