“I can only be what I am”.
Yes, but you are is dynamic and expansive in the core of the origins you share with Everything. You are that which the entire universe is being come manifested and individuated.
“And what if I am not able?”
Ability is a result, an aftermath. Preceding that is a decision. A choice. Becoming is a process and a journey upon which you can only begin if you decide to do so. And from there, the experience and the practice will yield the ability.
“Where do I start?”
Exactly where you are right now. Choice is always available. Where is within. And within you is the entire universe, waiting to happen.
What will you Be?