Welcome to christian chat, you don't have to overwhelm yourself here. I also would like to find people my own age (I'm 21 years) to have talks with and socialize, no longer living in the state's city, I come to places like this to do the same thing your doing.
I suppose a little explanation of the sites features would be helpful in helping you feel a little less overwhelmed. I'm also new here, but this is what I've figured out.
You are in the forum. Any user can respond here, a notification goes to your email not your sight inbox. threads can be tens of hundreds of pages if commented enough on. Remember if you comment on a thread this long, and it continues to grow at a fast pace, each response goes to your personal email! The forum categories are self explanatory, the theories and corruption forum being the only one you can't view logged off.
There is also a chat room for members and guests. This is usually frequented by the same individuals, and i've noticed who you get is somewhat dictated by the time of day.
The other feature I would consider a main function is your inbox messages, on the sight here. If you click the notifications link at the top of the page, a drop down list will appear which will say inbox, or a kind of notification. click on it, and it will bring you to the inbox. where you can send private messages to other users if you have their name. You also have a activity page, from which there are options on the left to send a private letter, which brings you to the same inbox, of use other options listed on the page. This is accessible to you be clicking on your name at the top of the website page.
This sight like most others has people who are here for discussing openly the overall sight theme, and also has people here who seem to be here to be internet bullys. I say this because somebody comments on your thread or replies back to you something upsetting, I would urge you to consider their possible reason before replying, if the person is seemingly trying to agitate you or not resolve agitating you, I would want you to know it is possible they are looking for a fight, you could walk away.
Well as a new user also this is about the extent I can help make sense of this place for you, there's little things you might notice like a forum post made a while ago which is still on the front page is still being commented on, meaning it could be interesting. Explore and see what's on the site a little, I have found some really cool concepts being shared here, and when you feel like speaking back to somebody, reply, get a conversation going.
Have a good one,
friendinpeace