It's not clear whether you are asking for advice, but I'll offer a little.
Yes, you should always try to get things as right as possible in the camera. But you are missing the point if you think that the purpose of post-processing is simply to fix mistakes. All digital images are processed. If you shoot JPEG, they are still processed, but using a fixed recipe for contrast, sharpening, etc., built into the camera's firmware. The main point of postprocessing is to make the image look like you want it to look. For example, the lighting may be too harsh or conversely too drab. Or there may be areas that are too bright or two dark, just because of what the scene looked like. If you want a good example, google to find the example of Ansel Adams' original and final Moonrise, Hernandez New Mexico.My new thing is to get my images as close as possible to the real thing that I don't have to post-process very much.
Here's an example of my own. First, the original shot--awful lighting, too short a lens, no ability to get close to compensate for the short lens, and tourists in the way. I didn't really make mistakes with the camera.
Here's the final version that I exhibited:
How much time have you put into studying how Photoshop works? there is a lot one has to learn even to use simpler postprocessing software, such as Lightroom, and Photoshop is orders of magnitude more complicated because it is both more powerful and more flexible. For example:Some edits fall into place immediately, but others have forced me to become more systematic. Of course, there have been shots that have a ton of potential that I've had to take into Photoshop unsuccessfully.
--Have you learned how the spread of the histogram affects contrast, and how to use the tools in LR and Photoshop to increase contrast by stretching the histogram? (The tools are different in the two.) This is usually the first thing I would teach.
--Have you studied how to use a curve to increase contrast? This is probably number two on my list.
--Have you learned techniques for dodging and burning?
--Have you started learning how to use selections, masks, and brushes to make other local adjustments?
--have you started learning how to use layers and blend modes?
--Have you studied the tools available for sharpening (again, different in LR and Photoshop)?
--Do you know how to manage local contrast using the texture and clarity sliders in Lightroom or unsharp mask in Photoshop?
These are some of the things (it's not an exhaustive list) that one has to learn to be adept at postprocessing. It takes most people (certainly me) a long time and a lot of systematic studying. People on this forum are very generous in helping people as they learn these things, so as you study and practice, you will generally get help if you post specific questions.