I'm trying to flash a new kernel and I'm having some issues

I'm trying to flash lamma sweet kernel http://forum.xda-developers.com/g4/d...ernel-t3286514 on a LG g4 h811 running Resurrection remix.
I've had nothing but trouble doing this with 2 builds.
It sends me to fastboot however I can't remember that fastboot said, (I will add the fastboot text later when I have a computer to type the text (I'm at the doctor).

I have sence then done the following
1) tries to get into fastboot using all methods available to me.
a) using the button combo
b) using my reboot menu
c) using adb
All the above methods simply reboot the device. so I'm thinking I don't have fastboot anymore.

My setup.
- I'm using a LG g4 h811 on T-Mobile
- I use twrp as my recovery
- My bootloader is unlocked
- my developer options have allow oem unlock enabled
- I'm unofficial running Resurrection Remix blackjubels edition http://forum.xda-developers.com/g4/d...remix-t3399365
- Here's my about phone

- my selinux set to is permissive (so i can use Viper4android)

If I've left anything out let me know and I will edit it on here.

Edit: right now I think my my main issue is i cant access fastboot.
My ultimate goal is to flash lamma sweet kernel.

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