Created a Fake Access Point Now What?

So i found this usefull tutorialhttps://null-byte.wonderhowto.com/how-to/hack-wi-fi-creating-evil-twin-wireless-access-point-eavesdrop-data-0147919/ on how to create a fake access point and now i would like to know the logical follow-up to this tutorial if i would like to sniff traffic.

Keep in mind im a "newbie" so the easier the better.

Thanks.