If you look up the word "expert" or "expertise" you will find that studies consider someone an expert after 10 YEARS or 10,000 hrs at their field. I read in a Nursing Journal that you become comfortable at nursing around 2 yrs. I am at that point. I know when a pt is in distress, I know what to do about it, but still have much to learn. Those two years were hard. I thought about quitting, made mistakes, got on the wrong side of doctors (always the difficult ones), was the brunt of comments on my ability as a nurse etc.
I have met or heard about nurses that have made mistakes that have killed patients. Always double check your meds especially if you are not totally positive that the dose is correct. I have gone to another nurse many times and asked, "Here are the figures, please check if they are correct." (never ask without figuring it out yourself first."
Keep a "brain sheet" for each pt. (There are links on this website for the best brain sheets on all disciplines) When a pt requests something or you see an intervention that needs to be done, WRITE it down. Fill the sheet out with titration rates, drip rates, doctor's orders, dosage, allergies, all that good nursing info. Then check it every hour.
Keep your charting short and to the point right now. No one wants to read a nurses opinion anyway.
Good luck, never thought I would make it but I have and you will also