I'm very interested in Judaism, and I would like to learn more about it. So I started to read this site and it is like a wall. Where can I find a gentle introduction to all this and the terms used. I'm specially interested in customs and how the Bible is read by observent followers. I hope I don't offend anybody with my question.
There are a variety of resources both on and off line. The best is via actual human contact, but unless you live near someone who can (and is willing and equipped to) give you a private conversation, that might be tough.
Online there are different kinds of sources:
this site deals with particular issues which distinguish Judaism from other religions http://whatjewsbelieve.org/
This site is more encyclopedic but with a less formal tone http://www.jewfaq.org/
This is more formally an encyclopedia https://www.jewishvirtuallibrary.org/religion
sites like this give a broad range of ideas in a more user friendly format http://judaism.about.com/od/judaismbasics/u/Judaism-101-Judaism-Basics.htm
This kind has a lot of detail but can be overwhelming http://www.chabad.org/
For some print resources, try here http://www.beingjewish.com/learning/reading_list.html
So the particular resource which is best suited will depend on if you are looking for history, current practice, underlying theology, or something else.
I would recommend getting a copy of the book "Jewish Literacy" by Rabbi Joseph Telushkin. It covers many different Jewish topics (history, theology, philosophy, culture) in brief, easy-to-read articles. It is widely available at many libraries and makes for a good "Judaism 101" course.
I think an interesting text to read might be Pirkei Avot, which is often called 'Abot' or 'Ethics of the Fathers' in English. It is part of a larger text called the Mishnah. Here is a link to the beginning of Pirkei Avot in the English translation of the Mishnah by Herbert Danby:
The reasons it might be a good reading project are that it is a classic text, it deals with themes that are very important in Judaism (mainly Torah study), and unlike other texts it is not about the details of particular laws, making it more approachable to read.