Use a tape measure, a pencil, and a level layout (mark the drill holes) for the concrete screws.
Place a 4’ level from hole to hole to make sure you're close to being level.
Using the hammer drill and bit pre-drill all of your bracket holes.
Once the bracket holes are drilled put the Tapcon through the bracket and sink anchors with a cordless drill.
Continue the above steps until all of your brackets are attached.
Place the painted shelves on the brackets and use the screws that came with the brackets to attach the shelves to the brackets from the underside.