https://github.com/0xroman1/Scuffed_Low_Level_Stash
Scuffed Stash for everything Binary Exploitation and Reverse Engineering related
Here are some recommended recourses to browse through if you are just starting off.
AT&T Syntax versus Intel Syntax
x86 and amd64 instruction reference
Understanding the differences between 8bit, 16bit, 32bit, and 64bit