The poem is a small joke with a shrug at the end. The speaker wants to peel an apple, a simple, everyday job, and ends up in a store packed with knives and swords. The gap between the tiny task and the huge, almost warlike choice is where the humor lives. All the speaker needs is a little blade, but the shelves offer weapons.
The last line, "ah, well," is where the feeling comes through. It sounds like a sigh, half amused and half tired. The speaker seems to recognize how absurd it is to be overwhelmed by options, or how easily a simple need gets tangled up in excess. Judging by the dash and the short line, the speaker doesn't solve anything. They just let it go.
The mood is light, wry, and gently self-aware. It's the kind of moment most people know: going out for something small and finding far more than you wanted.