Eating should be simple. Complicated diets are not necessary and are difficult to maintain. The key is to slowly increase the amount of nutrient rich food in your diet, and gradually reduce the empty calories that you may be used to eating. Avoid abruptly stopping foods that you have always eaten, as you may develop withdrawal effects.
There is not a particular formula or super diet that will suit everyone. It is about making the right individual choices for yourself, through understanding more about nutrition, and altering your habits accordingly. Over time your body will adapt to this new and healthier way of eating, and the effects on your wellbeing will start to radiate through in all areas of your life.
If you are keen on improving how you look and feel, then it is best to start making those introductions now.
When you start making changes to your eating habits, the results are not visible straight away. It takes time. Sometimes during this period you may feel worse before you start to feel better even, as the body often undergoes withdrawal symptoms from foods such as sugar and caffeine. Digestive symptoms, a coated tongue, dull and puffy skin, fatigue, fingernails that easily break, coarse weak hair can all signal that dietary changes are needed.
You are in control of your diet. So you should go at your pace. Planning is necessary, so that you don't just wait until you are hungry then reach out to the foods you find most satisfying, which will often be calorie rich and nutrient poor.