I myself am a recent new grad who started in the ED straight out of nursing school
with relatively no clinical experience (EMT-Basic for 6 months, ED-preceptorship for 1 month in nursing school). I am in my early 30's, so I wasn't exactly a doe-eyed new grad starting my first job ever though. From the start, it was quite the transition. I needed help for everything, IV-start success rate of maybe 50%, more than half the time had difficulty pulling labs from an existing line, couldn't read "physician-scratch", had to ask about various meds I had never given before and maybe a few times after that, couldn't anticipate labs, uncomfortable with vented patients, drips, etc. Just learning hospital protocol, the charting system, the multitude of forms and when to use them was a daunting task. However, I was a quick learner. Within a few short months, things finally clicked and I was no longer just tasking, having a greater sense of what was going on and enabling me to anticipate and prioritize more effectively. In time, I learned many tricks of the trade for our everyday tasks and gained confidence as an ED nurse. I became more competent and independent as time progressed, allowing my preceptor to do their own thing and me not having to ask for assistance every 10 minutes. I've been on my own for a few months now and that in itself was another huge transition, as I encountered many scenarios I had no experience with, yet worked through these with the help of a supportive staff.
My advice is to be patient. The biggest thing is patient safety; perhaps the new grad may be slow and require assistance, but as long as they know the difference of what can and can not harm the patient, and know when to ask for help, working in the ED should all click at some point, transitioning your newly precepted nurse from a bright-eyed new grad into a competent and proud ED nurse. I am thankful for my experience that I worked with wonderfully patient preceptors who worked with me and took the time to answer my multitude of questions without judgement and help me in the transition from school to practice. Best of luck with your new grad.