If I were you, depending on where you live and what hospitals/health systems offer, I'd do my best to either obtain a job as a nursing attendant (preferably in an ICU setting) or apply for nursing externships. Both seem to be the way to get your foot in the door for a fellowship position. I am not sure where you are obtaining your accelerated BSN but in my experience, some universities produce better nurses than others. With that said, my advice is that as a nursing attendant you will gain more experience and have more chances to network. As an extern, you have these opportunities as well, but I find the attendants make for stronger nurses as they have a stronger base. I do know people that entered critical care and were given maybe 8 weeks of orientation, but you need to be able to hold your own and know what's safe because they had told me plenty of horror stories of new grads in the ICU. Best of luck to you.