At first, when your main goal is to get away from them, it's okay to eat copious amounts of primal food. I used almonds as a crutch at first. Lots of almonds. Then, later, I dialed that back to once a week. Also, don't feel obligated to go the ketogenic route. Sweet potatoes are wonderful and it's definitely easy to lose weight - for most people - while still including them in the menu. I went keto, and recommend it, but it's not for everyone.
Steak, eggs, potatoes - fruits, nuts, berries and forage. Coconut milk and potent herbs and spices. Tea instead of coffee now and teeny amounts of kelp daily. Let's see how this does! Not really had dairy much, and gut seems better for it.