fear of accidents

I have recently graduated from cdl school.I went to orientation for flatbed.The second day a guy from safety gets up and tells us some graphic accidents that he knew about.After hearing this,I wanted to run outside.I heard a lot of negative during orientation and decided to go home early and not even finish this.I am very dissapointed in how they approach this new career that you are starting.Right now I still have this great fear of driving this monstrous thing even with a trainer after what I have just heard..