You can use speech-to-text on Microsoft Word through the "Dictate" feature, which lets you write using your own voice.

Copilot integration in Microsoft 365 apps makes it a snap to generate first drafts, revise text, and get instant summaries for long docs or email threads. Here’s how to use Copilot for writing ...

You can turn off autocorrect on Windows by toggling off two features in the "Typing" menu in Settings.