First did a sketch so I would remember perspective and keep the far away things narrow and the closer parts fat and juicy.
I started painting the far away bits of the tree, the backside of the trunk and the bushy leaf area. Then I painted the closer parts. I realized I should have painted the background first. So next time I'll do that. This is supposed to be a study for a larger project, so in that sense i've learned what to do differently on the big sheet.
Then I put the plastic wrap on the wet part and stood it up against a wall. I loaded my brush with water and applied the water above the painting so it would run down the wrinkles in the plastic wrap. Fingers are crossed, but will probably see something in need of a touch-up.