Need Help With Track Issue In Audacity

My wife recorded about 7 songs on one track in Audacity. It was saved. However, I need to use one song out of the 7 songs, and that song needs to be used in another separate Audacity recording. I know how to copy and paste, but don’t know what to do from there. I do not need the seven songs. Only the one. This is a project that has to finished tomorrow. Could someone please tell me what steps to take. Thank you.

So it is a matter of basic editing:

Select the portion of audio in which the needed song is encountered.
Menu “File” → Export selected audio → Export as WAV 16 bit x 44.1 kHz.
Go to the second project and import that WAV.

I think that’s all you need to know so far.

Then you may need to export the whole second project as mp3 or another format, but don’t use mp3 in an intermediate stage, just in the final result.