Hi @Former-Member, glad you joined the discussion. My first thought in reading your post is 'there's a time and a place for everything'. Right now it seems like your energy and efforts are best placed in working towards recovery/stability rather than setting more aspirational goals. I'm sure you'll get back there but there's no need to pile that on right now.
IMHO walking is the best exercise. I follow the work of Katy Bowman, a biomechanist, who is a huge proponent of natural movements like walking and stretching to return us to health. No need to torture yourself in a gym. And the best thing about walking for me is that you can use that time to listen to audiobooks and podcasts. That makes it a real pleasure.
Something else that might help is checking out the book Slow by Carl Honore or his Ted talk. It'll help give you a perspective shift on the value of taking your time. I doubt that all that rushing around pushing yourself to your limits was good for you even if it felt right at the time. There is real value in slowing down and choosing your goals wisely. Depth over speed.
One last thing to think about sometime is whether you can draw on your mindfulness practices to help with your relationship with food. There are some great books and audio tapes to help you with that process.
But as @Kurra has wisely recommended, one thing at a time will maximise your chances of success and keep the pressure off.
Take care @Former-Member,