Editing has been part of my "day job" for more than 20 years and I understand all the usual standards — Chicago Manual of Style and AP. I do recognize style as opposed to rigidly adhering to the rules, too.
Please let me know if you’re interested in a copyedit (spelling, grammar, syntax) for a self-publishing effort. I can make more in-depth recommendations or critique, too, if you wish.
And I’m always respectful of how much work an author has put into their manuscript… only look for ways to improve, not destroy or control.