Like most things, Microsoft documents this pretty well:
Use dictation to talk instead of type on your PC
Also, you can use the web search engine of your choosing, and put in exactly what's between the square brackets, [+"Windows 10" Speech Recognition Dictation] and you get scads of tutorials about this. I can't know who might like which tutorial, but they're targeted. It even returns documents with the equivalent of keyboard shortcuts documents for voice commands.
Brian - Windows 10 Pro, 64-Bit, Version 2004, Build 19041
The purpose of education is not to validate ignorance but to overcome it.
~ Lawrence Krauss