I'm tired of being fat

I'm 21 years old and weight 214 lbs. I'm simply tired of being fat. I started to working out about a month ago but don't feel any different. I know these things take time but how long? I use to be an athlete in my high school days and it's difficult to see my transform into a unhealthy shape. All I want is to be healthy and appear fit. Tired of this gut.