Rather than spending your time and effort trying to be something different…trying to be something that goes against your true self, work on un-become everything that isn’t really you.
Stop pretending to like that style of music because your friends do, stop going to the gym if you hate it (and find something physical you DO enjoy!), stop gossiping if it makes you feel uncomfortable.
The great part of this is, your time and effort can now be channeled into making a life you love…with the people you love. Being yourself will take less energy and is much easier!