I think I messed up please help me

No. Follow the official guide:

You do not have anything bootable on your storage device. The bootloader cannot find the operating system so you did not flash it correctly.

I found the flash drive that has the bootable files

Follow the instructions we have provided. The device only supports booting from MicroSD unless you’re an advanced Linux user.

Alright, I will try that when I have time. I am a basic user with out a card reader.