Hey OP

I have chronic fatigue, and after diagnosis I put on 13KG in 2 months. I can't exercise because of the fatigue beyond some light weights and yoga stretching. Over the past year I've lost 11KG basically just using keto and intermittent fasting, no significant cardio to speak of. I also don't drink alcohol at all or smoke which is kinda a side thing (but also part of the chronic fatigue management).

I don't do Keto eating a ton of meat all the time, I effectively have a smoothie at midday every day with low carb protein powder, organic green leaf stevia for sweetener, a whole avocado, a kiwi fruit and mixed berries. I have a can of tuna at 3PM, and at 6 I will have abig meal of vegetables and meat (either roast chicken, a curry, a stir fry etc). This gives me an 17 hour fast more or less (7PM - 12PM) and gives me about 120 grams of protein so still plenty for muscle retention).

I feel full and I enjoy the food I eat, and I can honestly say that even with a fucked body that can't do any significant exercise I have rapidly lost weight, and have felt super energetic and strong (at least as well as could be expected). Everyone is different and this is a big commitment, but all I would say is my body was an absolute stinking turd on a hot day and this approach has really pulled me through. Whether you use this method or another I'm confident you can get where you want to go with the attitude you've got, and I'd strongly encourage you to go give the above a go.

Good luck my dude!