The main thing for now is to get fully recovered and healed. You can worry about dietary changes later. With a high protein diet like Keto you have to watch out for the saturated fat content, which over time can clog up the arteries. Gundry recommends 'heart healthy' fats from olive oil and avocados. It's a variation on the Mediterranean diet.
I've been on the Gundry diet for several years and have lost ~ 55 lbs without even trying (from 268 to 212). Gundry himself lost 70 lbs. You cut out all the junk food, and most of the traditional grains (wheat, corn, soy, etc). The carb portion comes from resistant starches like sorghum and millet, plus other sources like turnips, rutabaga, sweet potatoes, jicama. These are resistant to breakdown/absorption, so they don't spike your blood sugar. They get into the large intestine and the idea is not so much to feed you, but to feed the good gut microbiome bacteria which are essential to good health.
You can also have beans, chickpeas, lentils, as long as they are pressure cooked (to inactivate the lectins). I double pressure cook big batches and freeze them, and also use them in various soups. For animal protein he recommends ~ 4 oz per day. I used ground bison, which is super lean, grass fed organic beef, and chicken, plus organic pastured eggs. He also recommends fish in moderation, but you have to watch out for heavy metals/mercury.
The rest are lots of leafy greens (I use organic spring mix) and various other vegetables, cruciferous, carrots, celery, etc. I would check out Gundry's approach. He uses food as medicine :o)
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