Another recommendation, about kcals:
Don't go for a standard daily kcal income, go for a standard daily deficit. Eating e.g. 1500kcals will work, but it will be harder to track if it worked and how much it worked. Plus if you sit or your butt one day 1500 is more than enough but if you run a half marathon 1500 is not even good for breakfast. Going the other way, e.g. eating 500kcals less than spent would be 100% measurable and also makes you sure you get the needed nutrients.
They way i'd do it ( the way i actually do it, lol ) is:
1) Get the TDEE that all those calculators give, for a sedentary lifestyle.
2) If you have the luxury, consume those exact calories for a couple of weeks. Correct the TDEE accordingly ( e.g. if you lose 1 kg, in 2 weeks, say it is 70% fat, so you lost 5000kcals in 14 days, so your TDEE is 350 kcals less than what you thought ).
3) Now use the established and verified personal no-workout-TDEE and each day add your activity kcals. Add only the major staff, the 'average day' stuff are already included in the previous steps. Ain't difficult, there are tables for everything that is worth counting. E.g. don't add anything i you had to walk 3 floors stairs , but if you go trekking or hiking, add it.
