Silly YaYa

Hey ya'll,
I'm 53. Standard yoyo dieting over the last 30 years...each time I gain, it's more than I lost. I have a lot to live for, so I'm getting the RNY gastric bypass.  I don't have a surgery date yet, but it's looking like it will be in August.
I live with my son, dil, and 2 grandkids. I want to live a long time to be a part of the family for years to come.
The only weight related diagnoses I have (shockingly, with a BMI of 59!) are high blood pressure and sleep apnea. My labs are great: Cholesterol is 176 with an HDL of 57, Triglycerides are 114, A1c is 5. We attribute that to having good genes, and boy, am I grateful for them!
I have chronic, severe, treatment-resistant, depression, so everything is harder than it should be. Even when I don't feel like I have a lot to live for, I make myself do it anyway. I take baby steps until I can see progress and then take bigger steps. This decision, though, to get surgery, is different. I actually have hope, and it feels strange because it's been a long time. I feel motivated, and that's new too. I'm hoping that being able to move and be active will help to decrease the depression, because I would like to avoid ECT if at all possible. I also have a hip problem and am on bedrest 90% of the time, per my orthopedic surgeon's orders. I can't have this fixed until I am down to 200#, so that's another motivator for me.