How do I intention correctly?

[The Protagonist]

First post here. Anyway I'm 17 so pretty young, inexperienced, lots of potential I want to harness. Discovered the LoA (The Secret) when I most needed it. Earlier this year when my life, grades, and everything was down the drain. It's helped me, a lot, and I am truly grateful for the opportunities that it has attracted to me. But right now my problem lies in the subtleties in the intention phase.

My current intention is to get into college, I'm applying to an extremely competitive school, and I really want to get in (sent in application). As it stands I am competent in the rat race, and I've been trying to intention getting in. But there are 3 different ways that I can intention which all have their small differences, but make a big difference in the long run. Should I believe that I am already accepted or should I think about being accepted (for example thinking about the Acceptance letter in the mail) or should I expect/demand from the universe that I be accepted. (and thank it afterwards!). Always give thanks

If I want to incorporate the belief that I am already accepted then it wouldn't make sense to think about being accepted, because why would I think about being accepted if my belief is I already am accepted. It's probably a little confusing to get what I'm trying to say here, but if you get it then you understand the 2 intentions go against each other creating confusion in my mind.

Somebody help me out here..Please n' Thank You