Okay wow, so I'm dumb. I didn't realize that the End Turn button was calling upon a specific skill (in hindsight, I should've realized that when I saw that clicking the button would bring up the text "player guards"
After swapping the guard skill that was there by default with the Wait skill from the example project, it works now! Enemies attack as they should, and the cards return to my hand as well. Thanks so much - I never would've thought to check the skills had you not mentioned it lol.
I'll make another post if I find any other major issues, but for now those were my main hiccups. Once again, thanks for the quick response!