As far as speed let me tell you what happened to me after 6 months at my first job, the model of care changed. I was on a med-surg unit where the acuity was really high, people were one acute event from going to the unit, and the model of care was going from nurses taking 6 patients instead of 5, and this was after I got my flow down I was comfortable I was able to split my time up face on the Acuity of the patience I had.
It took me another two months to adjust how I did things because taking on an extra patient really was difficult. Some going to have there were nurses taking shortcuts mistakes were being made for medications a sentinel event happened it was a huge mess.
Being a nurse is not about getting better faster. This is a long haul profession. It will take time to get better. The worst thing a nurse can do, in my opinion, is rush things.
Something else as a new nurse and i shout this because all of us often forget...
NO QUESTION IS A DUMB QUESTION
Make sure, if you doubt yourself, find that nurse you trust and say "here is what i am thinking about in regards to my patient and here is what i think i should do." That informs the other nurse you have good clinical judgement and can offet insight if you are missimg something.