Life and Army Question(s)...?

Alright so I live on an Island in North Carolina, 3 months out of the year (summer) there is an unlimited amount of things to do. The other 9 months of the year is pure hell. It's completely desolate down here in the winter and no one down here is really worth hanging out with because they are all caught up in doing coke and partying all night every night. That's not what I want to do with my life, when I'm in my late 20's early 30's I don't want to be wasting my life away partying all the time to make myself happy. I was always a smart kid in school but never was that interested probably had a C average, got kicked out of high school about 4 years ago because of girl problems (its a long story). Moved down here to the beach with my father and started a fresh new life. I got my GED scoring in the top 97%, I'm a pretty smart kid as I said. I've always wanted to join the military since I was a kid, and I have recently decided to join the United States Army. I played Tournament-level hockey for 7-8 years when I was younger, and played high school lacrosse for a year so I have played sports my entire life, and was VERY good at hockey. Every winter down here has progressively gotten worse so I decided to join the Army and get the hell out of here, experience the world, find out what I want to do for the rest of my life and get a college degree for it... My question to anyone who is reading this god forsaken long paragraph (sorry haha), is not too brief but I'll make a long story short. I can be confident at times, but recently my self-esteem and confidence as definatly been at an all time low. I know I'm a good looking guy, I am physically fit weighing around 160lbs at 5'8"(more or less height wise)and am all muscle. However I have always had a problem with accepting things the way they are, like illegalized marijuana, how the world revolves around money, and so many other things I cannot list. Not irrational things, but evidently thing that I myself cannot change. I constantly underestimate myself which is 1 of my weakness's. However I can be very tough and very decisive when I want to be. I am like 99% sure I want to join the army. My main problem is taking things out of proportion, worrying too much and stressing about things that seem big to me right now but end up they arn't that big of a deal. I think the army will get me back to my peak physical condition, as well as many other things I have been wanting to achieve for the past 2 years that I haven't played any sports. I guess I can be insecure or something idk, if you met me in person and/or saw a picture of me you probably wouldn't believe what I'm saying but sadly it's true lol. If anyone has any words of guidance or even better, wisdom please don't hesitate to post. Sorry for the length of this question, I don't come on here much, only when I have noone to talk to and really have a problem at hand. I feel like I need to take control of my own life and stop worrying about at other people would think, or anything like that. I'm letting my life control me at the moment, somewhat feeling sorry for myself and I'm intellectual enough to realize this. Please read all I had to say here and let me know your thoughts, the more thorough the better. Thank You!