Help learning new computer system

I just started new job. This hospital uses "Cerna" system. Have any of you used it before? We have this grueling orientation, where you sit for hours going thru it with an instructor. I feel totally overwhelmed and that I'm not getting it at all. Computer systems take me a little longer to learn, but I'm capable, just really freaking out about it. Everyone around me seems to be catching on fine but me. Any suggestions? I thank you for input.