1. Read the "Requirements for JDL Coach Applicants" section under the "Start a New Team" tab to make sure you are eligible to apply.
2. Talk to your friends/debate teammates/old coaches to find out if they think you would be good for this and what level of support you would receive from them.
3. Apply! You may have a prison in mind that you would like to start a JDL team in, though having a prison chosen is not required.