Going back to the gym

Mom and I are starting back to the gym this next week. Not really looking forward to going but I h ave to do something to get this weight off. I am about to start eating a protien bar and yogurt for breakfast and lunch everyday.that should help. I will see how things are going first. I'm just afraid of failure. Not sure what that would do to me if I can't do this. Mom keeps telling me I will have to have gastric bypass to lose the weight. I really hope not for more reasons then one. so wish me luck in all this. Lord knows I'm gonna need it