<p>I've been interested in 3D printing for the past month however, I have noticed that it's sort of a "reserved" topic. Meaning that everyone who talks about it, has already some basic knowledge about the topic. What are some good resources for someone who wants to start learning from zero? My main goal is to acquire enough knowledge in order to build my own 3D printer.</p>

The resources you have at your fingertips are going to be more up-to-date than anything you'll find in a paper/published book. Use this amazing thing called the internet and read everything you can find. Use Google or your favorite search engine using appropriate terms. I'd suggest, based on your overly broad question, that you use "build your own 3d printer" as a starting point.
You'll find that
Instructables
is one useful resource as well as
MakerShed
for additional material. You will find a very large source of helpful information at
3dprintboard.com
simply by reading others' posts there and at other forums as well.
There is quite a bit to absorb and understand but with the internet at your fingertips, you won't be lacking for information.