Wedding Weight Loss

Hey ladies I'm getting married next September and I need to start a fitness plan! I'm considered morbidly obese and I hate the way I look now. I've always struggled with being overweight and have started and quit multiple fitness plans over the years. I don't want to be embarrassed looking at my wedding photos for the rest of my life. Any tips on creating a fitness plan and sticking with it? Or things you have found useful? I don't want to spend my wedding day trying to look past what I see in the mirror.