I chimed in too late for this ride but all good stuff. My one comment to add to all is to instruct the passenger to not touch me above the waist, to hold onto my waist or the grab rails below the seat. My wife used to forget and grab my shoulders which feeds steering inputs directly to the bars.
She heard "when I go right, look right, when I go left, look left."
I went left, she looked left, saw the ground getting closer, and leaned right... I leaned more, she leaned more.....
We made it through the corner.
Then I stopped and we had some conversation.........
She rarely rides with me, and now when she mostly sits still.