When i came into the forum I found It a little difficult finding my way around and could barely relate or reply to some posts but I took it upon myself to learn the ethics and norms of forum and know what it's all about. And as time went by my journey here became easier even though I'm still under a learning process.
As long as you can follow the rules and don't break anything - then you will be guided to become a more mature user over time. The main problem is in your mindset - if you allow yourself to be afraid to argue and share your knowledge, your subconscious will turn you into a pessimistic user.
This is a community built on knowledge - but not all is a knowledgeable user on day one. I think you already know what you have to do - so just enjoy the ride and do what you need to do. By the way - don't take it too seriously, even if someone comes out to insult you.