How to record audio on Audacity either from a microphone or to capture the sounds of another program

To record on Audacity, you simply need to set up your microphone, add a track, and press the "Record" button ...

How to record your screen on a Windows 10 computer and capture your computer's audio along with it

You can screen record on Windows 10 using the Game Bar. A third-party app like OBS Studio allows you to record your screen and computer audio.