Sat Nam! (Literally "Truth Name"--a Sikh greeting)
There are several ways to do this.
At some writing conferences, some publishing professionals will do that for free. Willamette Writers Conference is one. Of course, you have to pay the fee for the conference.
At the back of Jeff Herman's Guide to Publishers, Editors & Literary Agents, is a list of reputable independent editors. I've used that list twice for different types of books. You can find the book in your library, probably, or order it online or find it at your nearest bookseller.
Once you have 50 posts, you can post your sample in the memoir section of Share Your Work. Password is vista. You may not receive a professional opinion, but you will get readers opinions of pacing and such like.
Best of luck.
Blessings,
Siri Kirpal