Either rip these cuts yourself on your table saw or have your store where you buy your wood rip the plywood down for you. You will have some scrap.

At first this may look daunting but I assure you, if you just measure, place the appropriate guide marks in pencil, and then use a hole saw it will be a breeze.

Take your 5 1/2" piece and measure from one long edge down one inch.
Make a guide mark all the way down your piece
Now measure and mark at 4" intervals using the short edge. You should have 5 guide marks across your board now.
Now measure and mark at 2" intervals using the short edge. You should have 6 of these marks across your board now.
Where your 1" down guide mark meets your 2" guide marks only, use a drill and cut a 1" hole.
Repeat across until you have six holes.
Once done, run it through the table saw at the 1" down guide mark carefully to keep a straight edge.

You just completed the notches that your wine bottles will rest in!

This is what your notched piece should now look like.

Now drill your pocket holes in you back piece.
Set the Kreg Jig at 3/4" and make your ph's on the BACK of the back piece that measures 24"x5"

Now attach the back to the bottom with 1 1/4" ph screws.

Now attach the front to the bottom with 1 1/4" ph screws and your done!

Its now complete you just need to stain or paint it!

Let me know if there are any errors and I will fix them. Hope you like it :)