A:AnswerOnly the first generation Apple Pencil.
Use these links from Apple for reference:
https://support.apple.com/en-us/HT211029
https://support.apple.com/en-us/HT205236
A:AnswerYes, you can draw on this iPad. I purchased the Generation 1 Apple pencil and my teenage granddaughter is using it to draw with whatever software she uses.
A:AnswerAny subscription can be dropped during the free trial phase, however if you do not cancel before the trial ends... you may have the possibility of getting charged.
A:AnswerI purchased the Apple brand keyboard. It connects instantly (magnetically). It also doubles as a screen cover and a stand. Only issue is it is a bit close to the screen and my wild fingers sometimes touch the screen while typing which moves the cursor. There are other compatible keyboards made by other brands but I wanted to stay with all Apple.