Make the cuts per the cut list in the plans. I would recommend dry-fitting the cuts as you go to get the best possible fit.
Set the Kreg Jig and the drill bit collar at 1½” thickness and make all the pocket holes as shown in the plans.
Using wood glue and 2½” pocket hole screws, attach the boards to build the legs.
Build the two shelves and top using wood glue and 2½” pocket screws.