A:AnswerI literally just bought one yesterday to work from home with. I got the space grey 128 (not the air) and it will be more than adequate assuming you have typical WiFi speed or wireless provider. I got an external keyboard with touch sense mouse pad and it’s very close to a traditional laptop as far as feel and capability. It’s actually better because it’s more portable. It even has Word. Doing bills and ZOOM is no problem.
A:AnswerYes, one can facetime with others who are using an iPhone or ipad, which makes it a quick and direct connection. If the other party does not have an iPhone or ipad, but other phone make/model such as an android, then you will have to use one of the apps that are out there to make face to face calls.
A:AnswerHere are some good links to reference directly from Apple's website...
https://support.apple.com/en-us/HT211029
https://support.apple.com/en-us/HT205236
A:AnswerIPads use IOs as their operating system. If you are certain that you require Windows, for whatever reason, you may be better off buying a different type of tablet called a 2 in 1 that is basically half tablet half PC (with windows). Windows and Apple don’t utilize each other’s operating systems.