A question about Voiceover symbol pronunciation on Mac

Hello Applevis,
As stated in the subject. I don't understand what is possible to change and what is not. The description in the guide is very very vague. Basically what I wanna do is, (e.g. the "." symbol) make VO announce it when there is words like com.apple.something, or generally change how the option left and right arrow keys affect which symbol is pronounce and how it is, or skipped. I don't wanna hear every dots in the sentences in the comments of my code though. Is it possible?
Same thing to counter slightly all the nstextview issues, like announcing . , ? and ! as we navigate with the rotor associated to commander shortcuts for example but not hear those when reading.