Whatever it is you want to do in life, someone else did it before you. Truly original thought is not found in the world we live in.
It is important to know what came before us, what was done before. We can learn from the mistakes others have made, giving us time focus on our own mistakes.
Mistakes are beautiful. Without mistakes we do not progress. We do not propel ourselves towards ultimate possibilities. We do not leave our comfort zone. We do not evolve.
Even if every idea bottled up inside your imagination has already existed, that idea is original to you. You are original, and you are able. Do not fear your ideas, they are incredible.