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>>3545
Lots of time and practice is needed. Maybe you can get to low-poly PS1 models (without textures) in a week or two if you're really dedicated. Beyond that it gets a lot harder, especially with humans where you have to have a good sense of anatomy and proportions. I plateaued at the low poly stage since I lost interest for now and have little time for it.
>What program would one use to make ara with?
Maya 2015 (don't download 2016+) or Blender. Look up tutorials on youtube and google. Textures are typically done in Photoshop or Gimp.
See this workflow overview of how a low-poly treasure island is made starting from basic shapes:
http://www.creativebloq.com/3d/how-create-low-poly-3d-models-121310159