Welcome to the forums! My only suggestion would be to stay in the fun gaming discussion threads, that's what I do. And of course, be respectful and kind, and others will treat you well too.
I first came here when my brother had been watching Zero Punctuation, and I eventually started watching it too. Then I saw that there were forums, and I was interested in reading some of them. This led to me lurking for a really long time until I decided I would either join and post my own opinions, or just stop reading the forums altogether. Funny enough, I don't watch ZP or anything on the site anymore, I just come here for the forums nowadays.
It's obvious what choice I made now of course. Though I don't post as much as I used to. Though I visit the site once a day, and if there is a thread about Zelda or Pokemon, I will never be far behind.