No offense, but if your writing skills are "up to par" then our education system is worse than I thought. There are several errors in grammar, spelling, and punctuation. I sincerely hope you will sit down with you English teacher as you say you will, and that you will talk to your Father and heed his advice.
Here's a sneak peek at some things your teacher might point out:
-Myself is one word, not two.
-Too many "to"s and "and"s. You don't need "to" after every comma. "I am young and naive and..." needs some structural work along with better choice of vocabulary.
-"serve my country to its fullest" doesn't make sense. What is the countrys "fullest"? Using "the" instead of "its" will work better. "Its" implies the country, not you. You want to serve the country to YOUR fullest, right?
-Those 2 sentences in the first paragraph do not make a "paragraph". I know, it's knit picking but people notice those kinds of things.
-Take the "by" out of the first sentence in the 2nd paragraph.
-You don't "pursue" the mental and physical training, "endure" or "overcome" may be better choices of words.
-NEVER start a sentence with "Also".
-Remove "by" again in the 2nd sentence of the 3rd paragraph.
There's a lot more I could mention, but I'll stop there. This post is getting too long.
On top of those language errors, the essay seems all about benefits for you. What do you have to offer the Navy? What will be their return on investment? It seems like you have the motivation to become an officer, now show them that you have the skill and desire to do great things through your service to the Country.
Edit: Shoot, everyone else beat me to it!