Hey @MStapleton!
If you don’t have WiFi at the moment, you might have encountered an issue another member did. This means that the update changed your Broadcom firmware, and the new one is having issues with your system. We resolved this a while back, but you might want to perform a re-installation and choose not to update anything during the process.
Make sure all your files are backed up first.
Then, once you re-install (I’m assuming you are installing Ubuntu, correct?) and reboot the actual system, do not update. Instead, follow the procedure from the step I am linking below:
Once this is over, you will have an updated system, and your WiFi will be working.
Also, if you ever need an actual Ethernet port, you can connect an external one to your USB-C port:
You can buy those anywhere for about $20. I’m attaching a link - as an indication - below:
https://www.bestbuy.com/site/platinum-usb-c-to-ethernet-adapter-white/6439238.p?skuId=6439238
Enjoy your journey, and please let me know if you encounter any issues! 