New Hypothesis

I've got a physics hypothesis.
I'm only 16 so I'm not a real part of the scientific community yet, though I one day hope to be.

My question:

What do I do with the paper I've written, where do I send it to ensure that if the hypothesis is correct, if the ideas are valid, that I get credit for them and someone else doesn't steal them?

(This probably sounds rather egoistic, and actually I do care more about advancing scientific knowledge than about personal gain, but on the other hand I do care about justice and I think the person who's idea it is deserves the credit.)

Try to find someone in a University where you live, who has expertise in the field and ask him/her kindly to read your manuscript. They will be able to advise properly.