installing trisquel mini/ usb fails to auto boot

hello everyone
im runing pop_os right now on my desktop i tried to make a bootable usb with trisquel mini on it using disks and from terminal sudo dd bs=4M if=trisquel-mini_8.0_amd64.iso of=/dev/sdc1 conv=fdatasync , and in both of them wen i tried to boot using the usb i get :
gnu grub version 2.02

Minimal BASH-like line editing is supported. For the first word, TAB
lists possible command completions. Anywhere else TAB lists possible
device or file completions.

grub>_

can u help me out i wanna install trisquel mini or try it and see if it works with my pc