It looks like the piece you are layering will be arrow straight. Not super desirable... You Generally want to try to layer a tree just below a spot with some interest- a nice curve, a tightly compacted branch ramification... Something that is difficult to find or create... Something that would look good on a shorter trunk...
Nothing wrong with doing it for practice of course, just giving you some advice for future layers. Obviously, I assume your intent was to remove this branch anyway? If so, you might could have gotten a more interesting tree if you layered it off lower, below the curve...
Looks like you packed it full of moss, and made a nice big chunk... Something I always seem to screw up- so, it looks like a solid job! Did you ring off the bark, or use a wire to wrap around the trunk?