asking for toutorials for porting rom and twrp for CC9 meitu dition

[yotamy]

Hi,
some developers posted their own versions for twrp for cc9 meitu edition (vela) ,thanks for that.
the problem is that those recoveries were not so good
further more, No one posted a global ROM for this device
can someone please help me and send me links for tutorial on these issues?
meaning, a link for porting twrp and a link for tutorial for porting global MIUI ROM

according to gsmarena.com the only difference between pyxis and vela is the RAM and storage, so i am hoping it wouldn't be that hard...

I would like to do this myself

Thanks,
Yotam