Answer: About celebrating yourself and human nature
Explanation:
Suppose that in your poem we can find a description of yourself and your vision about poetry. We can compare that with Walt Whitman's poem ''Song of myself''
In his poem, we can find a description of celebrating the human ability to be united with himself and with nature. He is celebrating the human body and the experience that his body can give it to him. Whitman has no regular form or meter in his poems so that should be the main character of your poem too.
Content of your poem compared to Whitman's should be about human nature, the human body, how the body is influencing you or people, your confidence and celebration of your work.