Cut your lumber or have it cut for you at your home improvement store.
Convert kitchen cabinet to trash pull out.
Use wood glue to attach trim to the front of the board to mimic trim on other cabinets.
Use a level to extend that line across the width of the inside of the cabinet wall.
You will be using that line as a guide for placing the two strips of wood which will hold the drawer hardware.
1 x 12 cut to 22 1 x 6 cut two pieces at 11 1 4 and two pieces at 20 1 2.
Attach them with two screws and two triangular cuts of 2x4s to form the door and base that the trash can would sit on.
Find pull out trash cans at lowe s today.