Hi everyone! Please help me to find the most suitable words! Is it correct?
I want to be an actor because it has been my dream since childhood. When I was a child my sister and I staged performances every summer. This is the only thing that I want to do in my life. I truly feel that I was born for it. It is my passion, my aim, I do devote my life to it and living it.

Question

Hi everyone! Please help  me to  find the most suitable words! Is it correct?
I want to be an actor because it has been my dream since childhood. When I was a child my sister and I staged performances every summer. This is the only thing that I want to do in my life. I truly feel that I was born for it. It is my passion, my aim, I do devote my life to it and living it.

Answer

I want to be an actor because it has been my dream since childhood. 
When I was a child my sister and I staged performances every summer. 
This is the only thing that I want to do in my life. 
I truly feel that I was born for it. 
It is my passion, my aim, I (do) devote my life to it and living it.

really good, you don't need the "do" but if you leave it in it emphasizes the "devote"

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