Only so much do I know, as I have lived. Maybe at first, but they get easier as you go along. The 21 Senses became the identifying characteristic of creative writing students and established the criteria from which they would measure all their other writing. Even with the directions you still feel uncomfortable about tackling this assignment. Now is the time to experiment.
Mistakes are okay.
Just try writing a Sense or two. They had to eliminate verbs of being from their writing, a task many found difficult. I especially like the verb tense he used in making his statement. His comment suggested that he would continue to work at eliminating passive verbs. The impact of the writing project would reach into his future writing.