rooting/safestrap/ custom rom process

[slimjerky]

hey guy i recently acquired a at&t note 3 on kitkat 4.4.2 i believe, im sorta experienced in rooting/rom installation but with all phones its always different. so could anyone give me the run down for rooting this device & installing safestrap so i can install a nougat based rom if possible?

 

[audit13]

The bootloader loader is locked so the phone can't run nougat.