137 to 110

I have always been pretty small naturally and have weighed about 110-115; that's the weight I feel most comfortable at. Almost two years ago I gave birth to a beautiful baby girl who had genetic issues and passed away at two months old. After she died I became very depressed and drank a lot of alcohol and ate a loooot of pizza. I stopped drinking a while ago but never said goodbye to food. Now I'm ready to stop self medicating with food and alcohol and get back to where I used to be physically and mentally. I started out at 137.5 and am already down to 131.5. My goal is to get back down to 110. I have very bad knees so I don't plan to do much exercise but I am going to be eating 1200-1300 calories a day and once I get closer to my goal weight I'll start incorporating some Pilates and weight lifting and more walks. I just don't want to try to do everything at once and be overwhelmed and quit, so that's my plan. Looking for some friends to keep me accountable and who I can motivate too!