It’s futile to plan for grad school at this point. Your upcoming undergrad years will take you in directions you can’t even anticipate at this time.
Definitely do apply to MIT, given what you’ve said about it being your ambition. Don’t let anyone discourage you. No one, not even the MIT adcoms can tell you if you’ll be accepted or not.
But do be realistic about yours and anyone’s chances of being admitted to MIT. Be certain to do your best with your applications to all your other schools.