One of the great attractions of training with kettlebells, for me at least, is that not only are they heavy weights that require a lot of effort to move around ballistically, but also that the effort itself requires a fair amount of skill. Not just technique (things like how your wrist shoul be at the end of the clean, the hinge at the hips…), but less tangible things like co-ordination and timing, and an awareness of the quality of movement at a given moment.
Both technique and skill require practice. It is indeed like learning a musical instrument. techniques might include how to hold the instrument, how to get a clean single note, how to get chords, what notes constitute a given scale, and so on. Skills include phrasing, feel, dynamics. Both aspects require a lot of practice.
When you pick up your bell, even if to give it a few desultory swings, think of it as PRACTICE. If you’re still perfecting things like cleans, Turkish get-ups and snatches, then it’s far more effective to do, say, five minutes of PRACTICE than to do five minutes of EFFORT. It’s an important perceptual shift. You’ll still get stronger either way, but by viewing it as practice, by taking your time, by being prepared to stop and think about a sticky point, by focusing on quality above quantity, you will improve more quickly.