Single Parent Support

Hey family How are yall doing ? I need help. I have a 10 year old son, whose overweight, he was born with a hole In his heart ,witch was fixed when he was three, but I dont push the issue for him playing sports because of that and I dont really believe in them. He's not very active he likes to play the game all day ,Now I'm growing concerned with his health, what are some health things you suggest ? I want get his weight down and more healthy choices.