Hello @delingren!
You're actually in good company here. There are many who have taken a MacBook with a busted screen, like yours, and simply amputated the screen to get a nice desktop computer with a built-in battery, keyboard, and trackpad.
For your first concern about the wireless antennas, you're in luck! As you can see [guide|117328|here|stepid=264029], the wireless antennas are actually in a bar right around the the hinge in the bottom section of the computer, so Wi-Fi and Bluetooth will still function with the display gone.
Also, about the display problem, you can just press Command+F1 to enable mirroring mode if the laptop ever tries displaying your login screen or anything else on the absent built-in screen. I double-checked that this works with a 2017 MacBook running Ventura, and it does, so you'll always have a plan if that does happen.
There are also many good videos and articles online about using a headless MacBook, so you may want to check those out before you proceed.
Good luck and enjoy your headless MacBook!