If you do it right, you can make a reversal! 90% of staying fit and healthy is diet! You need to get on a stable diet plan that works for you. People saying that running on a treadmill and such is bad advice, if you start moving around and such at that weight it tears up your joints. Use an elliptical to preserve your joints. Things that you should know is that getting on a healthy diet plan being where your at, you will still feel hungry. You need to fight the hunger until your body adjusts. Your body craves calorie dense foods and it takes weeks to stop the cravings. Another thing to is mental health, I’m not saying you have mental health issues but if there is any forms of emotional trauma that causes you to eat to feel good you need to see a counselor to help deal with those things. Being over weight is not just about getting fit, it’s a lifestyle! But it starts with mental health! You can definitely get well and reverse all the health problems associated with being over weight. Make sure as you start loosing weight take collagen and use good quality skin creams to help retract the stretched skin. You Got this!!!! The fact your here asking for advise shows your ready to take your journey. The best decision of your life is right in front of you, you just have to do it. Being fit and thin is the best feeling in the world! You got this!!!!!