Attempting to be what you can’t possibly be is the root of all your troubles. Trying to appear to be what you can’t possibly be is worse. There is usefulness in everything, there is beauty to be found in the most trivial of things. There are always people that seek and find these.
You can be changed, but not by yourself. You cannot change, you’re changed. And even that can be avoided: just keep on trying to be what you can’t possibly be, and all change will pass you by. How’s that for self-help?
Being a coward is better than attempting to come across as otherwise. As a coward’s coward you are at least extremely prudent, and that can be a great quality. There will definitely be a perfect place for you. But there’s no place for cowardly heroes.