@sofialo09 Do you enjoy--truly enjoy, in the moment--each of the things in this plan? If so, great! But if it's something you have to force yourself to do, or remind yourself of your end goal, see if you can find ways to... make each part of this plan a way your identity manifests in fun ways. These might be new ways, and you might need to change or otherwise reconsider your 'identity', but it should still express the very base core of who you are.
Maybe you love to dance, or you love the outdoors, or you consider yourself a risk-taker, or you love talking to others, or inspiring others, or so on. You can find ways to incorporate these aspects of yourself into whatever activity you do, and/or choose an activity that plays into who you are and your strengths. You can find and bring community or family with (ie, joining a friend, group, or going on a family walk or run that's at 'conversation' pace).
With food, well, you say it's being professionally managed, so trust their advice over anyone else's, but rather than forcing yourself to eat something you don't enjoy eating (for instance, I hate salads), you can find something that's healthy and fits your needs but is delicious (for me, this means 'eating' my spinach in citrusy smoothies). Maybe you'd be happier eating a large 'volume' of food, so you can adjust your diet/groceries by primarily buying low calorie density, healthy products. As someone who needs to eat a special diet, but also needs to eat an excessive amount, it actually takes a
lot of work and special strategies to gain weight on a 'healthy' diet when you're cooking from scratch and not eating gluten/dairy/etc, as the majority of produce is not calorie-dense.
You know yourself best, but focus on focusing on your 'identity', reframing your behaviour and habits as its manifestation, and simply loving and enjoying life. You won't see 'progress' right away, and might even see it temporarily slip back at times, so you need to be able to say you enjoy the process. Ideally your habits aren't choices, but something you do because it's part of how you
identify.