Don’t feel that your photographs have to be technically perfect. Experiment with different approaches in terms of both how you photograph, who you photograph, and how you post-process your images.
Personally I don’t like photographs that are “over-processed” like HDR photographs. However what Klein was doing with his photographs (extreme contrast, grain, and negative-manipulation) in the past is probably the modern-day equivalent approach of HDR.
So once again, screw the rules and create your own new ones. That is how Klein made a name for himself perhaps that is how you can make a name for yourself too.