Take some measurements of your kitchen and come up with a scale drawing with the kitchen wall cabinets you want to make. Make sure you get the width, height and length that you need.
Cut out the frame of your cabinets from the wood you purchased and screw them together. This is the frame that you will install later on.
Get some support rods for the shelf that will be at the middle and lower part of the frame. Make sure you have enough supports that will allow you to have more than two shelves.
Make a backing for the kitchen cabinets. This is a simple piece of wood that you will directly mount on the kitchen wall. Attach some studs on the backing so that it provides your kitchen wall cabinets with the support that is required.
Cut an adequate amount of wood to ensure that it fits the kitchen cabinets' end pieces. Secure the end pieces at the top, bottom and sides to ensure that the final result is neat. The doors can be precut or you can make your own but the precut ones are better since they will not require any additional cuts to be made in the wood.
The handles for your cabinets should be bought when you are purchasing the wood, after which you can easily screw them into the doors.