Below is the post processing course link:
https://learn.sudhirshivaramphotography.com/courses/post-processing-using-adobe-camera-raw-and-photoshop/

Of course, you should go through the entire course to learn and improve your photography as per this learning path:
https://learn.sudhirshivaramphotography.com/forums/discussion/photography-learning-path/

Post Processing with ACR + Photoshop