On a forum like this, it's hard not to fit in. I'd be a little less worried, but if you're too nervous, I'd suggest finding a topic where you feel comfortable discussing, like a Pokemon you like *coughScraggycough*. And you could also look into joining a clan. I personally rarely post outside of my clan, unless I'm greeting new members. It's a good way to make a lot of friends. A lot of clans are battle-heavy, but every single one I've seen has had roles for non-battlers like breeding, art, etc.