Serious answer You will need multiple languages, starting with Spanish, and Portugues you should be able to be fluent (speaking reading and writing) in at least 3 major languages, English, Spanish, French and at least speak Arabic and have a command of Farsi--the language of Iran. Russian would be a good idea, there is still a lot of the world where that is spoken.

Those are good start. I would also study whatever Oriental languages are available in your area. Japan and China have similar but different languages. They are NOT easy to learn. I would also learn as much Hindi, or what ever the major language of India's. But concentrate on Spanish, Portuguese. Both those will take you far,

Then you must study economics, current world politics, some history, and be familiar with what religions practiced in each country you visit. Sometimes not knowing religious taboos can get you killed. Especially in the mideast.

"how to survive" classes which are sometimes offered at colleges would be good. How to survive in the winter, how to make workable traps, how to find greens, etc. How to survive in the jungle, desert, in the mountains, You would need mountaineering classes for climbing skills.

what plants are edible, which can I use for medicine and how to make them. how can I make rope from vines, what can I use for glue if I need it?

You will need riding lessons as there are parts of the world where people ride more commonly than drive.

Does that help?