I’ve never taught but had plenty of teachers. One thing all my good teachers have had in common is that they’ve spent many hours teaching. I do think that the “over explaining” thing goes away with experience.

The teachers I’ve had that weren’t good.. well I’d say they were inflexible. If a students body doesn’t contort a certain way, don’t force it, work around it. If a student is struggling with a certain technique, try a different approach.. there’s not one single or right way. (I imagine if you took lessons with Manuel barrueco for instance there would be a single, right way which is his way, but he’s not teaching beginners. He’s teaching the best in the world. There’s a huge difference.)