I actually have an avo tree taller than me that I started this way 10 or so years ago. It is in a pot, and our climate is a bit cold for them, so I move it into the house in winter.
These are normally outside, just hiding from the worst of the winter.
I had better results when I peeled the brown outer shell. It’s also very hit and miss (2 started growing out of like 5-6)
Best results I’ve had are peeling only the lower part that is touching the water.