Providing a few macros to add some syntactic sugar could make this much better . On a separate note , theres no need for any self deprecation . I being a beginner found this post quite thoughtful and interesting .Keep going.
In all seriousness though, it's basically supposed to teach about function pointers.
I would never, ever recommend programming like this.
In response to the macros, i think that would make the program particularly hard to reason about because part of the program would be rewritten at compile time.
I would discourage the use of macros. I believe that Brian Kernighan would agree with me.
As a rule of thumb, it is better to use enums over #defines and avoid macros like death. Stick to the most standard, simple parts of the language and your programs will be most readable and likely elegant.
Macros are arguably one of the most standard and simplest parts of C. They are much more dependable than, say, gcc inline functions (in my experience). Just don't try to do bizarre things with them. Study how the best C programmers use them, and imitate.
And BTW, you should know that death is unavoidable! :)