You are not a fixed thing.  Growth is possible.

You don’t have to stop feeling like an imposter. You don’t have to stop feeling scared. You don’t have to banish anxiety or eliminate fear of failure or judgment. You do it scared. You do it feeling like an imposter. That’s the heartbeat of Acceptance and Commitment Therapy (ACT) model: you take committed action in alignment with your values, what matters to you — even when your internal world is a mess. You act not because you feel ready, but because the action itself matte

It is normal—and okay—to feel anxious, to feel insecure. The trick is to identify workable steps and actions. Ones that are doable, that are manageable—no matter how small. Small actions add up quickly. Once you’ve identified them, take them anxious. Take them insecure. Take them in spite of the anxiety. Tillich named his work The Courage to Be for precisely this reason: that the fact humans exist and keep going at all is an act of courage.