Thank you very much Charles for your answer.

I'd like to build this "workflow" for my future job: stenotype service. It means through a special keyboard I can write extremly fast in the way that I can subtitle in real time what a speaker says.
At 32 years old I've chosen this job because few moths ago due to a retina desase I've lost my sight and I can't go ahead with my last job (3D CAD drawer). I used programming in my last job, so as you said I understand intuitivly that it is possible, but I have no idea on how to do that for two reasosn: I have never done it, and even if I can study and try by myself the workflow is not completly accessible to a screen reader.

Why I tell you all of this? Simply because I don't want someone to work for me for free.
I need a technical support for custom features of Microsoft Word. The features are listed above: Timecode + Font size/type switch.
Even if I'm not yet ready for professional job (I'm still studying to increase speed and precision), I want to have all the tools I will need when I will be ready. So, as any other freelancer asset, it needs to invest a bit of money.

Can you Charles do that? Or can you link me where can I find this specialized kind of support?

I thank you very much again.

Good job!

Daniele.