OP I think you should give it a go, but be very careful. I’m a very pro vegan person but I’m always wary how to advocate it if someone has had an eating disorder. You do not want to end up harming yourself.
Did you have a dietician last time you had an eating disorder? In your situation I would suggest speaking to a professional first so that there is some support in place if you feel things are going the way they were before. If you don’t have your own dietician there are quite a lot of vegan friendly dieticians out there- some listed here plantbasedhealthprofessionals.com/directory-of-uk-plant-based-health-professsionals . Any dietician should really support you (as long as you are not compromising your health) as the British Dietic Association says a well-planned vegan diet can “support healthy living in people of all ages”.
As for tips this website is good and if you sign up (for free) you will get recipes, meal plans, dieticians advice, mentors and more. The mentors will support you and there will be no judgement whatsoever if you slip up, and no preaching. challenge22.com/ They don’t allow anyone with a current eating disorder to sign up because they don’t want anyone to be harmed but they will allow you if you’re fully recovered.
The most climate friendly option is to have a whole foods plant based diet but do allow yourself some vegan processed foods if it makes life easier. A suggested shopping list:
Some whole grains (brown rice, oats, bulgur wheat, barley etc)
Some wholewheat bread/ wraps/ bagels and pasta/ noodles
A few varieties of canned beans and lentils (or cheaper, dried beans)
Some leafy greens (I.e. spinach, kale, broccoli, lettuce, cabbage etc)
Some other veg (I.e. potatoes, mushrooms, tomatoes, beetroot, peas, squash, carrots etc)
Some fruit, local where possible (berries, apples, plums, pears etc)
A couple of blocks of Tofu and if you want, some meat analogues (beyond burgers, Richmond vegan sausages, soya mince etc)
If convenience is needed, some jar sauces like sweet and sour, pasta sauce, chilli sauce, bbq sauce, curry sauce, vegan cream cheese and vegan cream to for a creamy sauce etc or you can make your own sauces
Some plant milk (hemp and oat are best environmentally but any are better than cow’s milk)
Some vegan spread- naturli is best environmentally as it’s palm oil free but there’s also flora (most flavours but not buttery), vitalite, pure and violife spreads
Some nut butters
If you want- some biscuits (Jammy dodgers, bourbons, party rings, fruit shortcake, ginger nuts etc) and/or chocolate (nomo bars, vegan galaxy, most dark chocolate) and/ or ice cream (vegan Ben and jerrys, Swedish glace, vegan magnums, vegan cornettos etc)
Every few weeks:
Some nuts and seeds
Herbs and spices (and vegetable stock, salt, pepper, vinegar, soy sauce, oil, garlic etc)
Out of those things you could make loads of things such as:
Porridge
Salads
Bean chilli with bulgur wheat
Soups like red Lentil and barley soup with toast
Vegetable chickpea curry with brown rice
Tofu sweet and sour Stir fry with noodles
Shepherds Pie made with green lentils
Roast squash stuffed with herbs, spices, beans and tomatoes
Pea, kale butter bean and mushroom risotto
Spaghetti bolognese made with green lentils
Bbq bean burritos
And many more. Best of luck!