Body looks good, tail's a few fibres too heavy, while it is acceptable to have 1 or 2 wraps of thread under the tail to prop it up you have a lot under it. Also, don't cut the legs, measure them beforehand so you are left with only what you need. That said that fly will still catch fish!
the exposed underwrap was me not starting the body far enough back, for the legs, the video i watched said to bend back the excess from the wing case and trim to the length of the hook shank