To obtain the chipset that you are using, use one of the following commands.
For PCI card
For USB card
Also aircrack can be a little difficult to master but the guide is pretty straight forward. If you just want to learn about protocols then may I suggest tcpdump, nmap, even telnet can be used to give you a deeper understanding.
However as the first poster has said, we can't be of much help due to the fact that people can say they have good intentions or just want to learn about protocols but in the end they do illegal things.