n00b needs help!!!

I'm a semi-experienced android-er, I've rooted several devices and understand how Roms, Recovery, Odin, EFS Pro, Cygwin, etc.. work and what to do with them. I can't however, figure out how to root my Verizon S4 (lollipop) OR install a custom recovery mod. I have a stock .md5 that I can flash with Odin - I've tried modifying the PIT file and swapping recovery img's etc... and everything goes smoothly untill I get to the modified file and then I get an auth error. Can anyone help me get past this?

Help a n00b root his spg512 xperia z2 tablet!

Ok so i have a xperia z2 tablet spg512 i need help to root it seems.

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Current state of tablet: stock rom,stock recovery,unlocked bootloader i think? as least it was but i soft bricked it and flashed stock 4.4.4 in flashtool so maybe it relocked? anyone know?

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i tried to install twrp 2.8.7.0 but it won't boot. i heard about you need to flash another boot.img so i tried cm12 boot.img but it just soft bricked and i fixed it with flashtool. i just want crdroid on it. anyone can help me on whatsapp or hangouts? thx. also i know about rooting and have rooted alot of things also flashed ALOT of custom roms and recoveryies. but this confuses me.