Welcome to this forum, I hope you will find some interesting things to do here and will grow your knowledge more. I would love to share that, you should first read, if you are a newbie, read as many topics as you can, reading will give you more information about cryptocurrencies and even give you an idea of how things work here, because when someone makes a topic, he is not only supported (if right) instead opposed too (if wrong), it proofs the trust on the forum.

By reading replies under a topic, you will get to know how you can make replies and what type of replies you should give. I am not saying just take ideas from other replies and write them in your own words and post them, I am saying, you should read them and get an idea how they write it, and in what manner, like is it helping, bashing one, or opposing one. Try to understand the nature of the replies. Avoid abusive language. And try to be helpful and good to others.

I am mentioning some threads for you, if you have enough time, you should go through them.
Comprehensive guide to Bitcointalk. Newbie friendly + calculator and infographic
Knowledge to help you argue with bitcoin critics
Posting techniques for newbies on the forum