Wanting to loose fat and gain muscle

Hello all! I am Brandon and I am the middle child of 11 siblings. I currently work in law enforcement as a juvenile detective. I am training to do a 350 mile bike ride for Police Unity Tour in May of 2021. My goal is to loos about 10 to 20 pounds before the ride and gain more muscle mass. I hope this journey is successful and works for me well. I encourage all to stay on course and push yourselves.