Okay handicaps listen up.
2. No carbs. NO forgetIN CARBS. This includes added sugars. Natural sugars found in fruits and veggies is fine.
Ironic lol
Also, 500 calories isn't close to enough to what you should be eating. Here's the thing, you don't have to be thin to be healthy. Yeah, typically more weight = increased risk for all cause mortality but its not always the case. So instead of mentally and physically destroying yourself by starving yourself, you should focus on eating a slight caloric deficit (i.e. eat more than 500 loving calories a day) and focus on eating healthy. Start simple then work up by cutting certain things like sodas and other sugary drinks or cutting certain snacks and replacing it with something else. Then try to incorporate some exercise, even 10 minute bouts of something. Then start doing 2 or 3 10 minute bouts a day. Then try a 30 minute session ever other day until you can build into a steady routine.
Its tough but its worse when you think you're helping yourself by starving yourself but you're really just doing way more damage.
Take care of yourself and eat healthy and don't loving starve yourself please.
