Food Combining is designed to improve your quality of life. It is not a penance that you should endure. It will keep you alert and fit and following it should not make you anxious and worried.
Any move towards the Food Combining lifestyle will help you improve your health and fitness. It is not an all or nothing diet, and it doesn't have to be adopted in full all at once.
It's even better if you
Try not to eat until you are hungry, don't eat out of habit, and don't eat everything just because it is offered to you. Drink whenever you are thirsty, clean water is always the best way to quench a thirst.
The next step is to reduce your intake of concentrated protein - meat, fish, cheese, beans to just one meal a day.
Slowly increase the amount of exercise that you take. It need only be by a couple of minutes each day.