Default [Q] failed rooted sprint gs3 using eazy root on xda

this is my first attempt in rooting my sprint gs3 using the step by step on xda.. after doing so i realized i had knox and now my superuser is blocked and dont really know if i rooted properly.. my phone seems to be working but im not sure what to do from here. i tried hardbooting my phone to start over with some other way to root but i don't want to brick my phone can anyone help me and expain thing like a 3 yr old cause like i said i read and did and failed.