Arcadyan AW1000 switch from QWRT to OpenWRT

Hello!
I want to switch my Arcadyan AW1000 from QWRT to OpenWRT. Any tips?
Thanks in advance!

https://firmware-selector.openwrt.org/?version=SNAPSHOT&target=qualcommax%2Fipq807x&id=arcadyan_aw1000

Instructions here: