Usually we are inundated with peoples beliefs, societies beliefs of how we 'should' be, but what I do is write down what are the core values of me, who am I really (infinite/powerful/
It all starts with setting out your own desires and realizing that you are powerful and worth it. And also to remember other peoples expectations are simply their own expectations/perceptions/
The really interesting thing is that those who do not buy into reasons as to why they can not achieve or be who they wish make wonderful changes in the world. In fact a lot of breakthroughs were once thought to be unattainable or impossible, but those who dared it could, showed it could be possible.
Take a look at the Martin Luther Kings on the world, they took a stand because it was right and true for themselves despite at a time when societies expectations were a million miles apart, but by standing up, being strong even when our voice shakes, it causes us to actualize the true power of self...and you are powerful and worth it.