I promise you the little voices in the back of your head will be the death of any dream or goal you have for yourself. Whatever you want to do, just go ahead and do it, because telling yourself you can't or giving yourself EXCUSES for why you can't just prosper and do what your heart contents for your craft, will cause for a delay. To be honest, we will forever have self doubt and excuses because thats life.... but we have to take control of it.