Hi all,
Thanks for the tips! That helped me set up a mirrored image about the x-axis. However, I’m still having issues with the extrusion:

After selecting the surface with the Select Box tool, I pressed ‘E’ to extrude and then ‘X’ to lock it to the x-axis. All I got was a flat plane (and it’s mirrored counterpart) rather than a solid extrusion:


Am I missing something here? Starting to think I should go back and tackle that bootcamp before moving forward if I’m getting tripped up this early in the course. x)
Thanks again for all the help!