Help installing recovery on VS985 Lg G3

I've tried everything. (It feels like at least)
Here's my phones info. Just tell me what needs to be done so CWM or Phliz or TWRP is put on my phone. Sorry if this is coming off kinda crabby, I'm just frustrated is all.

Model Number: VS985 4G
Android OS: 5.0.1
Software Version : VS98523C
Build Number: LRX21Y
Rooted: Yes
Verizon Phone with AT&T Sim Card. ( Yeah I know 4g limits and not that same band, or something)

Please let me know if you need anymore information about the device.
Also, I get the "secure boot error" a lot when I attempt to install recoveries.
I'm no stranger to ADB or anything, but I just can't figure this one out.
A million thank you's if we figure this out.