Ryan

Welcome to our community, and welcome to healthy nutritious eating 🙂
No. I am not much of an exercise person. In fact, I was in the middle of keto when I broke my ankle, and on that very day I decided to start carnivore. I was sedentary for the next 2 months and still dropped 10 more pounds. It wasn't water weight either, because I had already been losing weight when I made the transition.
If you are a very large person, it is even recommended to wait until you have lost some weight before starting any vigorous exercise routine so you don't injure yourself. 
We would anticipate that you will lose weight if you are overweight. If you experience inflammation and pain related to such, this should start to go down as well. If you suffer from auto-immune or chronic conditions these may also go away over time (not immediately, per se). 
Issues you might face are the "keto flu" which is a run down feeling while your body transitions from being a glucose burner to a fat burner. Some people experience oxylate dumping. I'm personally not too familiar with it myself. 
If you have issues with certain meats or eggs, there is usually a reason and a workaround. 
Butter, lol.
This is somewhat different for each person. Calorie restricting and portion control can cause your body's metabolism to go down. Our advice to the beginner is to eat 3 meals a day with no snacking in-between, and to eat until you are full and comfortably satisfied but not stuffed to the point of agony.
Some of us, in time, take advantage of that feeling of not being hungry and start intermittent fasting, eating only 2 meals a day instead of 3. 
I personally eat about 2000 calories or so a day, split between 2 meals.
 
We're here to help. Hope this was informative, even it was brief.