The big initial hump I recall was syntax for writing main and what to #include, then header guards. That, and getting clang up and running in a docker on window

The big initial hump I recall was syntax for writing main and what to #include, then header guards. That, and getting clang up and running in a docker on windows so I could use new C++ features and flags that were blowing up with whatever compiler I got started on. Once I was able to iterate things started coming back quickly.