Great statement! While I'm only a junior in my nursing program
and can't really comment on the content of your personal statement (sounds good to me though :]), I'd love to help out a bit with the nitty gritty grammar stuff!
Your first paragraph is a little wordy...consider splitting up the ideas into two or three sentences. I would also consider rewording "there is much to nursing, that I could never be prepared enough." While I know what you mean (and totally agree!), the way you've phrased this is a bit of a hidden negative- I think your residency program is probably looking for confidence and competence in addition to humility :]
In your second paragraph (/ sentence, i'm not sure about the formatting!), I think you could select a better word than "thrilled." Maybe you could shift the focus of the sentence a bit...mention the quality of your education/how much you've learned (etc) rather than a subjective opinion of the education. Also, what do you mean by "this"? your education? if you state it explicitly, the sentence might be more effective!
The third paragraph has wonderful content! Throughout your statement, you've been very "real" - i hope the residency program people appreciate that quality about you! But, of course, I have a couple of suggestions for this section too :]
I would omit "admit" ...perhaps rephrase to read " As I prepare to graduate...." and state exactly what is exciting and frightening. (being a new nurse! continuing to learn! etc.)
For the second sentence in this section, you might consider shifting the focus of the sentence to be an active construction: for example," [This nurse residency program (state which program it is!)] will (enable/allow/prepare me/etc)...."
With [the residency program], I will benefit from [these factors], allowing me to practice with confidence and provide consistent and excellent care for my patients.
Your last sentence is good, but I don't know whether it necessarily fits with the focus of your statement... while a valid point, it reads a bit (to me, though i'm not an expert here!) like an afterthought. If it's really an important part of your argument, you might consider incorporating it throughout the piece?
Sorry if these are a lot of suggestions, and I hope I kind of made sense :] You have a great start already, and best of luck getting into your residency program! You sound like an awesome new nurse!!