Hi Vinay,
I am also a novice developer, and I have been working on implementing my own dissector in the past week or so. I have found a few useful documents:
The developer's readme:
http://anonsvn.wireshark.org/viewvc/trunk/doc/README.developer?revision=42602&view=markup
The developer's guide:
http://www.wireshark.org/docs/wsdg_html_chunked/You might also want to take a look at some of the dissectors that have already been implemented to get a feel for how they are structured. I'm not sure if any of these are considered "advanced" documents, but they should get you started.
Good luck!
Cody Doucette