I accidentally soft bricked my steam deck

Long story short, I just got my steam deck a few days ago, and I installed windows on my sd card because I discovered that I couldn't play warzone on the steam os, and then I learned that I need to have secure boot enabled, after playing with it a bit, i find out that it didn't have secure boot, so i tried to install secure boot with Deck SB because I wanted to paly warzone with my brother and now I cant boot into steamos as it says that "SteamOS has been blocked by the current security policy". I feel like I missed an important step in the install and now I can't boot into another drive even when I wiped the drive that it was installed in.

What can I do to fix this? I really want to be able to boot back to steam os