The first bowl teaches through the places where it refuses to stay round.

A first attempt teaches by resisting you. Where the walls collapse or pull off centre is precise information about pressure, speed, and where your attention drifted, and none of that was available before you tried. A perfect result would actually have taught you less, which is worth remembering when the early work is embarrassing to look at.

Instead of hiding your first attempts, keep them and note what each one went wrong about. Then make the next one aiming at that single fault rather than at general improvement. Faults are specific, and so is progress.