Sentencing character letter

I am the fiancé of a man that is facing two life sentences for alleged drug offenses. We are going to get a plea deal of course being federal of 8-15 years maybe more. I can’t seem to even start a character letter because I’m so scared to not write I t well. I need help. It’s a one page letter to a federal judge and it means years in the difference of years he will serve. I’m his future wife and girl pf 4 years. I need it to follow rules of saying who I am and our relationship, how we know his offenses where wrong, ask for leniency, tell them that he has gone back to god, sobriety and wants to be a valuable law abiding citizen and no return to his past. Also that he has a support system of family, myself, step children and friends . Something about we know the severities of his offenses And don’t take them lightly. How sorry he is. How he had already changed. Drug free. Wants to be a valuable member of the community. This is a very serious situation and my life depends on it. I need so much help! Asap. Sentencing is most likely June but no date yet, let me know if you guys can help.
Sincerely Tara Rice
Call text or email if you please. Also you can Google Cory Jobe Kansas City federal indictment and you will see the seriousness of this. You have to follow rules on this letter and can find a lot on you tube and every other internet outlet . Thank you very much again!