It's always too early to quit.
Who seeks shall find.
To be a good loser is to learn how to win.
Leap, and the net will appear.
Go for it now. The future is promised to no one.
Begin to be now what you will be hereafter.
Always desire to learn something useful.
Without hard work, nothing grows but weeds.
Know or listen to those who know.
If you think you can do it, you can.
Besides the actual reading in class of many poems, I would suggest you do two things: first, while teaching everything you can and keeping free of it, teach that poetry is a mode of discourse that differs from logical exposition.