Also not a programmer, and I can tell you once you get started it is nowhere near as daunting as it appears to be.
This entry in the thread summarizes how to make Polly a TTS engine in the GUI. You can make your call file point to a context in the GUI, then start using the TTS from the GUI, using the variables you have stored in the call file.
Otherwise as jerson mentioned, you need to put a context that references it in the call file.
The guy in this post put everything in an php script as another option to try.