That is fine that you are curious about hacking wifi, but please remember, hacking into something that does not belong to you is illegal. Please use your own equipment that is own by you. Having your own hacking lab will make learning so much more fun anyway. Guides and books are a dime a dozen for wifi hacking and you will need to learn a bit about linux as well.
Get yourself an old wireless router off ebay and setup a VM with Kali Linux. You will also need a supported Wireless adapter. Look into Alfa wireless cards, something like the AWUS051NH. This card will have the supported drivers that let you monitor wireless traffic.
I dont know how to hack but I do know that people dont appreciate to get their private information and products exploited. Hacking is illegal.
by Trials and Errors.