Before attempting any colour work, it goes without saying that you need to do the blur.
https://www.damiensymonds.net/2010/06/blurring-background-false-dof.html
Well, the first step is for me to take a look at one of the "blurry" files, and one of the "good" ones. Please send them to me via https://spaces.hightail.com/uplink/BellePhotography