Can i odin TWRP without rooting?

Hi i have problem with my Note5. Since i update it to MM i cant get pass with my lock screen. And i dont want to do a factory reset. I am planning to flash the TWRP so that i can wipe everything excluding the system so that i can still have my files. Is that possible? If yes how can i flash the TWRP? What i need to do? Also i am not sure if the OEM on my phone is ON. If its off can i still proceed to flash the TWRP using ODIN? Thanks in advance

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