I recommend everyone try a Whole 30, even if keto. I found that dairy does not bother me much, but some of it causes me to overeat, like yogurt. Cheese not so much. I therefore have limited my dairy, but do use it on occasion.
As for spicy food, I did Whole 30 without spicy food, and now I realize that spicy food causes me an immediate allergic reaction. I get inflamed and have allergy symptoms. I though this is just a symptom of eating the food, but now I realize it’s more complex than that. I still eat spicy food, but I limit the times to maybe once or a few times a month.