Turkish cast on help

I’ve read several tutorials on this cast on but I still can’t get it right. The very last “wrap” or stitch really isn’t a stitch so when I go to knit the “stitch” it just falls apart but if I wrap it all the way around the needle during the cast-on, then it seems like I’ll have an extra stitch… I’m trying to learn how to knit two socks at the same time using magic loop ( 1 long needle )and the Turkish cast-on . I’m doing something wrong and I’m very frustrated. If someone could help me discern what my mistakes are I 'd sure appreciate it. THANKS!:wall: