Just a little heads up for anyone who gets stuck, if you connect your nano directly to your laptop and run bettercap inorder to mitm clients connected to the nano via your laptop, when you run bettercap it will detect you home router (or whatever your laptop is connected to) as your gateway ie 192.168.0.1 and you will get error of not being able to get router mac address, In order for this to work properly you have to use to -G flag in bettercap and set your gateway as the pineapple address 172.16.42.1 and then it will enable you to mitm your connected clients browsing the web via your laptop