Small guide :
First unlock FRP Lock from your stock os at setting enable developer mode and you will seen OEM Unlock then unlock bootloader using
This guide is for mya-l22 but also working on L41 and i flash (Twrp-3.2.1 for Huawei Y6 2017 - it have some issue (not responding slide/language) you can avoid it by clicking on TWRP welcome logo on lang tab before it appear)
Also you need to change format on Data using TWRP to ext4 or if you don't do it once your os is loaded will ask you for Password bcs data is encrypted ..
Other issue that can appear is twrp bootloop .. i fixed it by using one tool named "TOOL_ALL_IN_ONE" from there i reboot to bootloader and flashed
this recovery using 4pda (you will need to login before download it or won't let you do it
At end i install using TWRP gapps =]
ps. If you have other questions ask em here i will try to respond fast as i can
ps 2. : Don't istall gapps there is some issue with em phone goes so laggy .. no idea if
@aby.du.13 check if there is some issue on kernel side
