HDR and Color Management are more of technical sides of color correction/grading, but they are fundamentals to have your creative color works delivered correctly and presented as you intended.
These two videos opened my eyes to these two important concepts, coming straight from the DaVinci Resolve 17 manual author herself.
“You still have access to the original signal at every stage of the workflow.”
I highly recommend that you watch and study them before starting your next color projects.