In the current New England Journal Medicine a study was published on the effects of a newb asking a question that at it's core doesn't matter. The study concluded that overthinking combined with not searching a forum correlates with a deflation of the subject's self-esteem, increase of SA, redirection to the stickies, and the discovery of the search button.
BTW, to cut your next question off....
"NO" as prior service you can not enter the service with an 18x contract. You either enlist and wait until you are allowed by your unit to apply to SFAS or you enter thru the NG.
Stay safe?