I would like to go to a Ivy League School or a high recognized University?

I am 15 years of age and as the title reads i would like to go to an ivy league school or high recognized University . I understand that it is very hard to get into a Ivy League school and even Harder trying to pay tuition . Really the reason i want to go to a recognized school is because i always had this fantasy were I was surrounded with people of high intellect and who are going to be something great in the world and I very much would love to be a part of that .I understand to get into the best school you must have outstanding grades , been in different groups/organizations , considered a well rounded student,write an incredible essay , and have great recommendations from mentors ie, doctors, lawyers , teachers , etc .Then you only have a 5% chance maybe of getting in . I simply just want to have something that may give me a 1 up on my competition like a website or organization that may help me have a better chance of getting in .By the way i would LOVE to become a dentist and make a difference in people`s lives .Thank you and reading and god bless