I just want to know if i can reply or qoute in any of the discussion.
I have been suggested by the one who introduced me to the forum that you should learn little by little and should not quote for posts that were made by high member ranking users.
It's not good advice. You can quote everyone's posts. But make quotes only when you have to say something important or want to add your minds to discussion and don't repeat what was already said. It's good advice not to quote pyramids - quotes which consists from multiple posts because it makes threads messy. Quote only part of text that you want to answer.