[help] i want to learn how to compile twrp and cm for my device

I am really want to learn to how to compile twrp and rom for my device. I had search many articles to learn,and i also had compiled twrp for my device but it does not work. Now i have cm12.1 and device source. If someone can teach me, i would very happy and thank you a lot.
Sorry for my bad English.
by the way, my device is nubia z9 mini