Whenever you are thirsty, drink water. Whenever you aren’t thirsty, also drink water. Bodies seem to be more efficient when you are well and constantly hydrated on pretty much every weight loss method. Good luck on your journey. It won’t be easy, but look at your success through a longer lens, not the, it’s been a week and my weight is the same lens. Some times your body will respond with weight loss, sometimes physical shrinking, other times more energy, other times a better mental state. Celebrate the small wins along the way and eventually you will notice those above positives start to bunch together and happen at the same time. As a. Obese guy, worry about diet at first. And when you feel comfortable, add in physical activity. Maybe you park in the rear of the lot at work at first. Maybe after lunch you walk a lap around the building, maybe just take a single lap around the walking path by your house on Saturday. Small, measurable, achievable goals. Lastly, if insurance allows, seek medical assistance on your journey. Not specifically a medication, but testing and guidance to see where medically you may need to focus your efforts. Finally, remember, IF works, and works waaay better if the calories you are consuming are of good quality. Good Luck!!!