Natnat

Hello, i am just signed p here and i am glad i found this website. I have a programming knowledge and i know basic networking (sockets, scapy, TCP/IP, common protocols, common attacks) and a little bit of Linux. I want to learn more from this amazing site, and it has a lot of material so i am not sure where should i be starting from.. Can someone give me a little guidance about the order of learning pls? thx.