teach me advanced format book for self publishing

My 255-page book (published once in 2013) is edited and still in Word 2016. I have gone through it to update some content (staying within the 10% change to keep the same ISBN) and to dedicate it to one of my mentors who recently passed. Right now, it needs new page headers and numbers, index and notes coordination. I have not been able to teach myself these advanced skills. Ideally, I would love to screen share with an expert, while teaching me these skills. You can see the first edition on Amazon: Celestial Psychology: A Guidebook for Co-Creating Miracles, Luminosity, and Conscious Evolution. A quick glance will indicate that my original editor went the extra mile for formatting, unfortunately, she is no longer available.