If I were to have a novel published or an article in a magazine, would I have a better shot at college?
With self publishing these days, it’s practically meaningless. But you’ve been told this elsewhere too. You want to be noticed? Get it published by a legit publisher who is going to invest tens of thousands of dollars or more into your work.
A more practical/plausible alternative may be to submit your novel or novel selection to Young Arts or National Scholastic Art and Writing and hope for an award you can list on your common application.