Hi and welcome to iRV2.
I am sure you will find lots of information here.
If your cabinets are like mine were, they are a big open place. What I did was go down to home depot and bought the wire shelf with the lip on the bottom you see in laundry rooms. I turned it over so the lip could be used to hold things in decided how high I needed it and installed it with the included hardware. Just be careful when drilling the pilot holes not to go to deep or you could end up with a hole to the outside or another room.
I don't have any pictures but if you need some I will get them.