And tried to follow everything, but I didn't really understand what I was doing and was in a state of panic. I can go into details of what I did if needs be, but long story short, whenever I boot up my phone I get the bootloader unlocked screen and do not boot into the OS. I cannot also access the Recovery window, and it has the android mascot lying on its back with a red triangle.
All I want to do is fix my phone, if anyone could guide me through this, I'd be forever grateful.
tl;dr: F**ked up, possible bricked my phone and don't know what to do.
Many thanks for any response.