<p>I don’t think it has to take more than one year to substantially change - I think it depends on what you do in that one year.</p>
<p>But I don’t think OP has realistic plans, or particularly good plans, for the gap year. First of all, unlike most, I don’t get the point of a gap year unless you didn’t get into a desired school and/or can’t afford to go to any school to which you are admitted. The main problem is that unless your family is relatively wealthy, there’s little you can afford to do as an 18-year-old high school graduate.</p>
<p>Moving to San Francisco? As already pointed out, that’s really expensive and no high school grad with zero training is going to make enough to afford an apartment there. Are your parents wealthy enough to put you up in an SF apartment?</p>
<p>Making money? With what job? Again, without training beyond high school you’ll be lucky to make much more than minimum wage flipping burgers or selling clothes - unless you’re a prodigy-level programmer or build the next great app. Start-ups usually hire college grads with some sort of technical/mathematical/computer science major.</p>
<p>Travel the world? Again, are your parents wealthy enough to fund this? Most of the travel-the-world options I can think of (teaching English abroad, Peace Corps, volunteer programs, etc.) require a college degree.</p>
<p>The other thing is - forgive me, but de-stress from what, exactly? I know from your vantage point high school can seem stressful - something worthy of taking a year “off” afterwards - but in a few years you’ll be amused at how stressful you thought high school was once.</p>
<p>Traveling the world is certainly not a once-in-a-lifetime opportunity. Being naive enough to think that you will be free of the “burdens of life” is…certainly something that is limited to being around 18. You can have new life experiences, freedom, and explore the world at Stanford. In September you’ll be joining thousands of the nation’s best and brightest 18-22-year-olds, with whom you will seize the world. You can study abroad for a year in college (in a different country each semester, if you want). You can major in computer science and spend your summer interning at tech start-ups. And after you graduate, the world is your oyster! You can do a Fulbright and teach English abroad in a completely different second or third country (after your study abroad), then come back and work in that tech start-up you crave. You can move to San Francisco with some of your Stanford friends bunked up in a 4-bedroom or something.</p>
<p>You are super, super young. You have plenty of time to explore the world, both during your years at Stanford and after. Personally, I argue that traveling and exploring when you have money and/or the means to make it is way more fun than doing it really broke.</p>