@futurebird I bet you have a student who has set up their own network for home use. They can help.
Setting up the network itself could be as easy as installing a consumer-grade WiFi router. The “internet side” of the router hooks up to your regular school network, and all your stuff connects to the WiFi network and the LAN ports on the router. The router will handle protocols like DNS and DHCP with little or no intervention from you.