If you are in a direct care OHN position you will have emergent care episodes. Even in a corporate setting (were I am now) you will see emergent episodes in front of you if you are paying attention. Two days ago I had two different co-workers at two different times who came to me for a work-related question. I recognized that both were having a very significant asthma attack but they were under the impression that they had outgrown it. What you will be exposed to depends on the industry and setting.
In an earlier thread I covered my favorite resources including those for emergency care in OHN. Below is the link.
http://allnurses.com/forums/showthre...&threadid=5066
Your few nursing life experiences could be a draw back. But you should still try for the job you want. Expectations of new hire OHN’s varies from one area to another. As to how difficult to get a position, it depends on how many openings are in your area.