Default [Q] Secure boot, 4.4.2 & recovery

Hello everybody, i made some search on the forum but i didn't find the answer to my question, so i ask it here.

I'm actually on 4.4.2 stock rom, i'm rooted (it's not a pre-rooted 4.4.2 but i rooted it after with some weirds methods) anyway, i don't have recovery and when i try to access it i get a secure boot error, it's ok because i can boot on the desktop..

I want to know how can i get a 4.4.2 version rooted & with a recovery mode like twrp. Does i need to install a 4.4.2 stock pre-rooted with the recovery mode pre-installed ? If yes, how can i do this ?

I also received an lg update on my phone and at the send of the installations i got this message "Your device seems to be rooted, you can't update it".

Thank your for the help