Missouri Legal Name Change

Do I need a lawyer to get papers for a name change? Also how can I get a fee waiver?
Im a 17yr old FTM I plan to change my first name and middle. Can I change my name too?

Can someone give me instructions step by step on a legal name change of a minor in Missouri.

You fill out the necessary forms, submit to your local courthouse, to attend a hearing and publish a legal notice in the newspaper. If you are a minor, your parents may file the required forms and attend the hearing.