Greetings. I made this post because after days of searching and trying stuff I could not find a solution-answer to my problem-question. So, I burned Linux kali with the 4.9.0-kali3-amd64 kernel to a 32 gb usb3 flash drive and enabled encrypted persistence. I also bought a TP-LINK TL-WN722N wireless network usb adapter in order to be mobile with kali's use. Now, my questions:

1) Where do I find and how do I install the correct drivers for my device ( and how do I make sure that they will not be discarded at reboot )
2) Whenever I update kali with apt-get update and apt-get-upgrade, will my changed be saved in the persistence partition or should I avoid updating.
3) Should I install kali on my usb rather than make a live usb? (are 32 gb enough and will it perform better or worse?)

Thank you for your patience,
sincerely a linux newbie