How hard is learning Blender? I could do it in a month, right...?

Depends on what you wanna do. It's a very big program and learning the whole thing in a month isn't likely. But if you want to be pretty good at modeling in a month, that could totally happen. This course from CG Cookie is really good.

BLENDER BASICS 1 - Introduction to Blender and Welcome to CG Cookie

YouTube video by CG Cookie