New to Intermittent Fasting with Keto

I am a  Metastasis Breast cancer surviver going on two years with no signs of disease. I was over weight when I started and now even more over weight. I guess I was one of those people instead of loosing weight I gained because I was eating what ever I wanted from the drive through because I couldn't take walking around the grocery store for food or sometimes cook for myself so thats how I survived. Now that I am better I need to loose this weight. I have had cancer twice and been through chemo twice for about 10 years of treatments and I don't want to Have cancer anymore or go through chemo. I have 80lbs to loose and get healthy so I can figure out what to do with the rest of my life. I welcome any other people out there who has gone through this or similar with their stories.  I have been doing IF and Keto for I think 6 weeks and lost 12lbs. I started doing 16/8 now I am doing a 20/4 started this a few days ago I hope I will continue to drop weight faster.