Finding a Neighbor's IP

Hey guys, I am new to this whole stuff. Been reading some guides and tutorial and I think I'm getting the hang of it. Thing is, I am trying to hack into a neighbor's pc (I have his permission). All of the recoinnesance and exploiting tools I see already asume you have your victim's IP address, which I do not have. The most I've been able to get is his MAC address by sniffing the traffic with airodump-ng. Is there any way to get the victim's IP with the MAC address or by network sniffing? (Wireshark doesn't show any ARP traffic, and thus doesn't show any ips).

I have thought of creating an evil twin and then using something like Ettercarp to find the IP. Any recommendations/tips? Thanks in advance