Must use open source Gapps. only correct firmwear by Psy-man (see my earlier idiots guide) and only firmwear then rom then pico x64 official gapps. No kernels no supersu no magisk of any kind until after its booted.
I experienced stalls in set up an a lot of set up errors
also I found I had to format data before I installed anything which completely wipes your whole rom
after installation via twrp please do not wipe cache. Just a plain reboot
Good luck mate.
Took me 2 days lol. What a lot of senior members here forget is that not everyone can do what they do. I mean has the skill to write roms and things.
I am not a noob but compared to developers I am a noob lol