There is absolutely nothing wrong with wanting to change your appearance or body. It is completely normal for you to change your body, especially if you feel like it will help give you more confidence. On the other hand, you don't have to change your body if you don't want to. What matters is how YOU feel about YOURself.
If you're just starting getting into fitness or want to aim for a goal that has nothing to do with the way you look, here is a list of 10 goals to consider.
1. Gaining strength in your deadlift.
2. Running your first 10K.
3. Decreasing your average resting heart rate.
4. Hiking your first high elevation trail.
5. Improving your squat form.
6. Increasing your running duration.
7. Completing 10 unbroken push-ups.
8. Consistently having more energy.
9. Increasing your speed on the trails.
10. Completing 5 pull-ups.
Feel free to add to this list!