The answer to every question you have is yes.
My advice would be not to get too concerned about your specific window at the beginning. If you're really hungry at noon. Eat. I don't know what your current schedule is but there is no reason you can't break yourself in over the course of a week to the window you want.
Also - some people don't do well in a small window. Mine is 2-10. People do well with a 5-10 hour window of eating. So find what works for you and try to stick with it.
Drink lots of water during the fasting period especially at the beginning. Helps to prevent headaches.
Doing light exercise like your job requires is perfect for the fasting period.
If you want to find the support thread just search for other posts I have made.
Last bit of advice - don't tell your friends what they're doing unless you're prepared to explain why it's perfectly natural and healthy. Best case you'll get concern - worst case a well intentioned lecture about how important breakfast is.