It can be done. Look at the comments above you. Plan a two to three year process. It will be slow and hard sometimes, but it will change your life and likely extend it.
Drop the carbs as low as necessary. Minimize animal fats where feasible. No oilor butter in anything. An equal amount of cheese calories is more filling than a pat of butter or a tablespoon of oil.
Have all the coffee and diet sodas you need to get by. You will need it. You might even want to take up nicorette gum lol.