Separate into tracks

I have Audacity 2.3.0, Windows 7 I am new at this but I am trying to convert old cassettes into MP3s. I successfully did that, but it is all in one big MP3, I have not figured out how to make separate tracks ans label each one the same as the cassette. Thanks

See: https://manual.audacityteam.org/man/splitting_a_recording_into_separate_tracks.html

WC