Break up the performance you've recorded into individual songs and poems, cutting wherever there is a natural break. You can edit it back together later if you would like to present a longer program when you are finished, but approaching it one item at a time will make the task more manageable and allow you to perform finer edits without worrying about changing the whole track. Listen to each track and take note of any issues you would like to correct.
Begin with issues that are consistent across the tracks. This will most likely be issues from equipment noise, such as buzzing or humming. Look at the waveform of the track and look for the frequency of the hum or buzz; this will usually be a high frequency. Use the filter menu to select a hum filter, and filter out the frequency. The noise may be across several frequencies, and it may require several filters. Once you've designed a filter for the first track, save it and apply it to the rest of the tracks.
Edit out any stutters, gaps or unwanted audio from each track. Listen to each of your edits to make sure that the edit is smooth and will not be obvious to the audience. Also, listen to ensure that your filters are not ruining the audio in some respect. If the audio sounds unclear, tweak the filters. Place understanding your audio over removing sound.
Play back the audio for friends or family, so they can offer feedback about how natural the audio sounds and what you could do to improve it. This generally will involve spacing the edits. Once complete, either edit the full performance back together, or post the individual tracks where you would like people to have access to them.