My plans directly after highschool

Since I can remember I have had wanderlust, the need to travel and see the world, but strangely enough I have only been out of the country once, to Amsterdam. I have seen the East and West Coast but not much in-between. This desire to move around might stem from my father, who has traveled the world in various Rock n’ Roll bands. I think a more likely reason for my need to move is to broaden my horizons, so to speak, to gain a greater understanding of the world and it’s inhabitants through personal experience. After high school, most people either go to college immediately, or settle into a career choice, but I aim to do neither of these things. After high school, while I am able to move, I plan to move as much as possible.
Coming from a middle-class family of at least decent intelligence, most of my relatives went to college, and most of these directly after high school. They all say one should have a larger worldview before attending a college that usually cements you in a certain career or field. I feel the more variation one experiences in life, the more versatile that person can be. If not for experiences, why do we live life? The majority of people who go to college directly after high school have their career decided by their major, and when they get out of college they get a job in their career of choice and just move up, taking vacations here and there to see new places. I would rather do it in one quick burst and have as much experience in different locales as possible as early as possible.
There is also the romantic idea of a nomad, one who just goes where the going is good, never staying in one place for too long. While having a home is nice, I do want to experience not having a solid comfortable place to stay. Due to my father’s touring of the world he has friends and connections in most major cities. who would probably oblige me to stay for one night here and there. I also train for a discipline called Parkour, an art of movement involving overcoming obstacles at speed, and the practitioners around the world are notoriously helpful to fellow practitioners. If all else fails there are always hostels and hotels.
There are many ways one would need to prepare for a journey of this magnitude: financially, physically, mentally, and materially. Right now I try to live as cheaply as possible to save money: I don’t have a car, I don’t have a cell phone, and I am able to live off of $25 a week; other than that I save all the money I get. Not only would I need money, I would need to be able to travel with minimum excess baggage. I would have to be able to carry all of my essentials in an average sized backpack. I would include a tent, for times when housing isn’t available, a small number of clothes, a GPS device with Internet capability, some sort of first aid kit, and many other necessities. I would also need to be extremely physically fit in order to endure the possible hardships that come with living without the many of the luxuries of modern life.
Many people travel, few people travel extensively. Before I die I would like to travel as far and wide as I possibly can, preferably visiting all seven continents, and if technology keeps progressing like it has, maybe someday going beyond our own atmosphere. The more varied experiences I have, the better I can comprehend the world as a whole, and what better way to experience varied culture and situations than by travelling? The vast majority of people are complacent in the small level of experience they have had, staying in their comfort zone without ever improving their ability to cope with experiences that make them uncomfortable--I am not this way. I seek to always improve, move forward, and adapt in ways that will fit my current environment. The world never stands still--everything is always changing--everything is always moving; should I not accept this and become comfortable with movement, both on a long and short-term basis?