What you can do is fire up a virtual machine of Kali Linux and use one of the WiFi scanning tools (such as Wifite2) to show access points, channels, signal strength and so on from where the laptop is and then walk around to see what changes make to the wifi coverage.
Make a change to the AP location and then note the change in signal strength.
It’s not perfect and there are better tools out there but they cost a lot of money and Kali is free.
There are some good principles to follow though, put the AP up high, don’t put it near a microwave, don’t put it next to a ton of metal or between thick walls and expect the signal to be good.
WiFi signal is very very inefficient and adds a ton over latency when compared to LAN cable connections.
