If you just want to learn to read an disassembly, use something like the Godbolt Compiler Explorer online to generate the assembly code for some trivial functio

If you just want to learn to read an disassembly, use something like the Godbolt Compiler Explorer online to generate the assembly code for some trivial functions and try to understand their meaning line by line. Get one of the Intel reference manuals on x64 architecture to help you along.