Re: Only one deep hive body for my area....confused about process.
You will need to get the bees working above the queen excluder. Either add the first planned honey super for a week or so, to get the bees up there and working or move up a couple of frames of brood and just install the queen excluder - bees will stay with the brood.
The last option works far better when you have all the same size frames - all deep supers or all medium supers.
If you always do what you always did, you'll always get what you always got!