A little confused on how to get TWRP on my new Kindle Fire HDX 7"

Hey, so I purchased a Kindle Fire HDX 7" that came with the 13.3.0.5 firmware.

From what I was able to gather on here I was able to root, and disable the OTA , also installed xposed and HDxposed.

I might have got a little ahead of myself seeing I really want to get the bootloader unlock, twrp installed, and get a proper android OS rom installed.

All the posts I can find seem to be updated to only work on firmware .3.2.3.2 , and by flashing a rom using adb or a third party app to get twrp installed. From there it's smooth sailing to installing a custom rom.

So my question is , how the heck to I upgrade to firmware .3.2.3.2 without twrp already installed, and where can I find these .bins to get there?

Thanks for the help in advance.

CONFUSED

Hey guys!
Need a small clarification!
Its been almost 2 years since I bought this extraordinary Note 2 but now I'm wondering whether to keep it!
I was thinking about giving up this phone for YU YUREKA PLUS
:D:confused::confused:
Give me a reason to keep this baby I.e Note 2 !
Forgive me if you guys think its a dumb question! Sorry!!

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