Changing text-format for body field
You're already using it, default text-only shows up when there is no other choice.

If you add another format: ie: "test", now you will see in the drop down CKEditor and test. 

Also, you probably did not select CKeditor as your text editor. Did you enable the CKeditor module?



I highly recommend not using minimal installation. I just tried it and a lot of the modules are disabled, just figuring this stuff out it's quite the headache.

Normal installation is the way to go IMO.