A self-checkout is read as doing alone what someone used to help with. Tradition links it to independence, impatience, and the small frustration of an item that will not scan.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.