Rocket science is really simple.

It is only made to look hard because only a few people actually get to work with it, and those people have to basically throw away their freedom to be "in the know"

Rockets carried man to the moon?
You can't get there from here on a rocket.

Anyway, the map is not the terrain.
However, if the map is not an accurate representation of the terrain, then your life will face many hardships.

But, a good map will give you insights into your surroundings that you couldn't see before.