The word "am established" implies that someone or something is firmly settled or recognized in a particular position or status. Antonyms for this phrase could include "unproven", "unfamiliar", "untested", "unestablished", or "novel". These words suggest that there is some level of uncertainty or doubt surrounding the person or thing in question, and that they have not yet achieved the same level of stability or recognition as something that is established. While being established can be seen as a positive thing, embracing new ideas and approaches that challenge the status quo can also be valuable.