Kettlebells are fine. Just look up proper technique. They can be dangerous if done wrong.
The thing I always tell people is you can always go back to grains. I think everyone should, preferably try two months free and see how it goes. But at least give it a month.
And get good fats. In addition to the ones I listed avocados are good and macadamia nuts and oil. Stay away from vegetable oils and margarine, the omega 6 can be very harmful to a lot of people.
Wild caught seafood and grass fed protein sources are best if you can find them. And lots of people will have vastly different ideas, that's all good. Just listing what has worked for me.