Connecting MacBook to internet

The Apple Store or online, reputable resellers offer an adapter to connect

Mac to internet via Ethernet: "Belkin USB-C to Gigabit Ethernet Adapter".

https://www.apple.com/shop/product/HJKF2ZM/A/belkin-usb-c-to-gigabit-ethernet-adapter

"The Belkin USB-C to Gigabit Ethernet Adapter allows you to connect to wired networks

with speed and endurance where wireless connectivity is unreliable or inconsistent.

Perfect for MacBook with USB-C port, or MacBook Pro with Thunderbolt 3 (USB-C) ports.."

• 'Best USB-C to Ethernet Adapters' for MacBook in 2012 - iGeeksBlog

https://www.igeeksblog.com/best-usb-c-to-ethernet-adapters/

• Adapters for the Thunderbolt 3 or USB-C port on your Mac or iPad Pro - Apple Support

https://support.apple.com/en-us/HT207443

you shouldn’t need a cable or anything - you can just connect from the top left of the screen on your mac and it should work