End goals are easy to create. What is your ideal weight and fitness level? When do you want to reach those levels? Setting intermediary goals is more challenging. You need to give yourself enough time to reach your goal and yet not so much time that you can slack off too much.
How many goals should you set?
You need to give yourself at least one month between goals and I wouldn’t set any goals more than 90 days apart. Doing either of these could lead to missing your goals or procrastination.