If you are serious, the easiest way is to start saving a fairly big chunk of money. The first people to Mars will be astronauts, and competition for those seats

If you are serious, the easiest way is to start saving a fairly big chunk of money. The first people to Mars will be astronauts, and competition for those seats is extremely high. You are better off being person 50,000 and the way that looks like it is shaping out is with a fairly large cash outlay, or an extremely valuable profession that has a statistically lower likelihood of being learned within a couple years by a very motivated person.