I'm a complete novice.
I am using QGIS but am open to trying anything else.
I am trying to make a map like the example at http://www.hydrosheds.org/.
HydroSHEDS provides void filled elevation, hydrologically conditioned elevation, drainage direction, flow accumulation, and a vector of rivers.
With this data I know I should be able to 'easily' output a map like the example.
As a complete beginner I am overwhelmed with the many different ways it seems like you can do this.
What is the most simple way to create an image like the example with this data?
Should I be using a different GIS software?
Should I be using a different data set?