There are a few telltale signs that you are in ketosis. If you wake up with a fruity, metallic taste in your mouth, also called keto breath, it is an indication that your body is effectively manufacturing ketones. You could also experience a certain mental sharpness when the body runs high on ketones.

No. If you keep within the guidelines of net carbs you should find that you will naturally consume fewer calories.

The amount of weight you lose is totally dependent on you. Obviously adding exercise to your regimen will speed up your weight loss.