Having Trouble with booting/installing Sequoia on MacPro 5,1

Got a new SSD for Christmas and wanted to install Sequoia on it. I have OCLP and Monterey on the current boot drive. I created a USB installer and was able to successfully install Sequoia on the new SSD. Everything seemed to be working pretty well, and I was pretty happy. Turned it off for the night, but when I went to boot into it today, it just hung on the Apple logo with no progress bar under it. Figured nothing was on it yet, so I would just wipe it and retry, but I can't seem to even load the installer now. The installer just hangs on the Apple logo, too.

On top of that, when I hold option down when booting, I don't get any boot picker to choose the EFI. It's just a grey screen. And it will stay there until I hold the power button to reboot. It's been like this for a while, too.

If I don't hold down option when booting, then the OpenCore boot picker will come up, though.

Any solution for any of these issues would be majorly welcomed.

boot picker that comes up if I don't hold down option when booting. I hit spacebar before I took this image, so there's a lot more options that typical. Usually it's just the Macintosh HD and Install Sequoia options.

grey screen when holding option when booting

Sequoia installer and SSD with Sequoia originally installed on it hangs on Apple logo with no progress bar