Edit out deadair, Burn CD from Audacity project

Audacity 2.06
Windows 7 Pro
Recorded from AGPteK USB cassette deck.
Duck calling tape
will record to LITEON eNAU108 burner
I need to edit out some dead air at end of recording and don’t know what “Cut” or “Clip” mean, nor how to use them, or even if they are correct to edit out dead air. I am afraid to lose what I have recorded and have to record it over again.
Then how to go from an Audacity saved project to burn CDs that will play on any CD player.

Just select the dead air you want to remove then use Edit > Delete or its shortcut Ctrl + K
See this page in the Manual: http://manual.audacityteam.org/o/man/edit_menu.html

Have a good read of this tutorial from the Manual: http://manual.audacityteam.org/o/man/burning_music_files_to_a_cd.html