And with that, I'm done cutting and mortaring down the coping. Just need to do the grout and then that step will truly be done. This turned out way better than I could have ever anticipated, and dare I say better than I would have expected had I paid a 'professional.' I'm especially happy with the corners of the steps here.
I need to give a lot of thanks to
@jimmythegreek because I used his past comments around this forum extensively when figuring out how to do this step. I don't think he's been on here much lately, but I hope he's well, and anyone that comes after me trying to do this I highly recommend you seek out his advice.