Dear Gaurav ji,
You sound an information hungry 'sikh' that is a pure sikh. May I suggest that before you jump too deep into anything look on the net and find out good and bad about all that you need. This source (sikhphilosophy.net) has infinite information on it and you will find that there is no restriction to the type of people who can look for the 'truth' or 'god'. I believe the freedom offered by Sikhisim is unparalleled compared to anyother religion.
If you get the opportunity to access the net try
YouTube - Holy Sikhism,
http://www.youtube.com/watch?v=YlXKg8HYzm8&feature=related and find associated information there also.
There are white sikhs, black sikhs and lots other. These people were not wooed into Sikhism - they made their choice by information from various sources.
I am reading a book at present about a Phd professor in Islamic studies who when he found out that Islam was based on contradictory premises, lack of truth seeking intentions and teaches hatred and intolerance of other religions was nearly killed by the religious people and the state of Egypt for changing over to Christianty - it is a very calming fact that Sikhism is totally opposite and encourages very simple route to the 'Lord'.
There is another book 'Conversation with god' that simplifies the route and I believe Sikhism is the same - the lord tells the author that the only difference between people like you and me and the likes of Guru Nanak is the fact that he listened to the inner voice (that is what makes you feel what is right or wrong) and never deviated from that 'truth' where as we may get lazy or take liberty and change the 'truth' slightly and thus get on to wrong track and from there further away from the right track that soon we do not know where we are. The point being keep life as simple as possible and follow the lord's voice.
Let me know if this helps you to do what makes you feel good (without hurting people around you) and then learn about the subjects that interest you.