Default [Q] changing stock roms

Hi there. I have a Telus Samsung Galaxy S4. I recently unlocked the phone so i can switch to rogers, i was wondering if it is at all possible to replace my telus stock rom with a rogers stock rom.

I'm pretty new to this whole rom flashing situation and i'm concerned about bricking my phone. but on the other hand i wouldn't mind getting rid of my telus apps and getting the rogers ones.

i understand that rooting my phone will allow me to delete apps and what not, but i'm not really sure how to start with all this.