You are not a failure. That spell doesn't work. Magick can not be used to transform you or anyone into something else. You are human, you always will be, nothing will change that. Magick can also not change any item into something else.
I suggest that you read more about magick and what it can really do. The SoM survival guide has some practices in it that will help you. The basic section in that article is very good, it has good information all through it.