Just my opinion, but I think you are getting to far into the weeds. IMHO, you should do the following:
1) start at a decent calorie count (2500) of good, nutritious food (no sugar, good protein, nice mix of veggies...throw in fruit to conquer any sweet cravings)
2) start exercising regularly and start pushing yourself.
3) slowly creep back on food intake and pay attention to how it is affecting your exercise. If it hurts your exercise...hold off on dropping any more calories until your exercising regains momentum.
Just keep doing #3 until you find a good balance of caloric intake and exercise ability.
In the mean time, you can make adjustments to the food you eat and the exercises you do as you do more research and see how your body responds.
This is good advice, although I'll add that when exercising, you should be exercising to gain
muscle, not do the cardio rat race. Muscle is the key because your body is going to use those extra (quality) calories to repair, which will also jack up your metabolism. More muscle mass will also need higher caloric intake, so if you have a weak moment(s), then you're not going to take a fat conversion hit as quickly as the average (non-muscular) Joe. For me personally, I've also noticed a huge difference in my body going from 3 day powerlifting to 4, metabolism-wise. Everyone will differ, but I'd start out with 3, and then increase to 4, and then 5 if you can (even if it's 15 minutes that day). You have to be consistent, it doesn't even matter how much weight you lift but that you keep your body in the repair phase and that metabolism stays high. Consistency is the #1 thing you have to focus on, even when there are days you are mentally weak and don't want to do it. Hell, even I struggle with that, especially if there's a million other things going on in my life.
Muscle is how you attack fat from the inside out, since it's always working for you in the calorie battle. It's like a pet, be sure to feed it well (protein, good carbs, continue to give it resistance training) or it will die and you'll get sick with grief (be fat). Don't let your pet die, people!