For recording an audio, there are several recording software/apps available on your laptops and mobile telephones. You do not have to buy any special equipment (microphone, camera, lights etc.) for recording at home.
Windows 7/10 both
have built in audio/video recorder apps that can record good quality audio in
mp3 format. Voice recorder apps are also in-built in android and iOS
smartphones and tablets. Moreover, Zoom and Google Meet can also be used to record
audios and videos of synchronous or even asynchronous sessions.