Starting at a corner, screw in a cup hook in the center of the 2x2. Evenly space the remaining hooks down the center of each part of the rectangle frame face. You will end up with four hooks running along each side of the frame.
Cut the middle wall plywood to size and drill 3/4" pocket holes into the four sides. Attach to the side panels with 1-1/4" pocket hole screws. Cut the bottom shelf to size and drill 3/4" pocket holes into the underside of the shelf. Attach with 1-1/4" pocket hole screws. Cut the 2" x 2" bottom shelf trim to length and drill two 1-1/2" pocket holes into each end. Attach the plywood shelf to the bottom shelf trim with 1-1/4" pocket hole screws and use 2-1/2" pocket hole screws to attach the bottom shelf trim to the legs.