Don't be upset if you don't get it right the first time. There will be some hard-learned lessons. Exercises that looked great in the planning stages, may not work in reality. The purpose of pilot sessions is to figure out what works, what does not, and what to improve. I rewrote 90 percent of my first training session and trashed most of the exercises.
Tutorials are constantly under revision.
After the initial pilot, you may totally rethink and change the program. Successful training programs are 50 percent material and 50 percent presenter. Acting as a trainer is a new and difficult role for many information specialists. Don't give up, practice makes perfect. The time and materials investment involved in producing Internet training programs can put a strain on the library resources, but ignoring the opportunities and falling behind also has a price tag.