Entering ketosis is much simpler with experience. You will recognize the cravings for carbs for what they are and know from experience that they will soon pass. The ability to reduce body fat while maintaining muscle mass through activity is the reason many enter ketosis. However many also experience many other health benefits. For example, a reduction in diabetic and pre-diabetic symptoms.
The biggest challenge to maintaining ketosis is the ready supply of carbs that are part of the food pyramid. 1 donut or 4 apples are about your maximum daily carbs to remain in ketosis.