The absolute key here is creating healthy habits for when you titrate down and eventually off. Not eating at all, not prioritizing protein intake, and not weight training is simply...body wasting.
I would highly recommend to start tracking calories...everything that passes you lips. Use a scale, use measuring cups, all of it...you can't start to make things work for you long-term unless you start to understand how much of everything you eat translates into how much caloric intake.
Your titration schedule also seems incredibly rapid. I realize you're starting with a lot to lose but you must be looking at the long-game here at some point.
