Lady-prayer said
Dragon- I Would only take this step with someone I trust so completely that waterboarding wouldnt make them talk. So, only clergy or a therapist for me. I know some people who when taking this step in AA went to priest and did their step 5 under the protection of the church though they are atheist.
If those options arent viable try a friend's parent, an older mentor, neighbor or if you really arent comfortable with those choices or you dont have those choices. Forget the other human, go outside, sit somewhere comfortably, read your list out loud to the universe than burn or bury it