The page you've referred to captures my problem exactly - I can only find documentation about installing a profile that requires the use of the Mac App Configurator. As a mac app, as far as I am aware, it will only work on a mac computer - not on ipads, iphones or windows pc's.
Anyone who has any kind of further info about how to work around this, please let me know! I've read some information about getting a "wifi bridge" to lower the security on the wifi signal, or else, achieving something similar by turning my laptop into a wifi hotspot. But my internet router is a very basic one that was provided by my internet service as the supported device, and does not have an ethernet port. So I believe that without the ethernet port, both of those options aren't possible with my current setup.