Hi, and welcome
NuCreation85!
The forum has pretty much been laid out for you. I'm new as well, and I feel the same about the forum being a little overwhelming in the beginning.
Here's what I do. First, I read. I read, and read, but didn't yet reply. It helped me to get a bit of a grasp on the forum, and the personalities of all these wonderful ladies.
Then I chose ONE section. In my case, it's the 20-something's. In a little while I might branch out. I am currently in a Thanksgiving Day challenge, so I have to go to other areas every day to read, but I've added the specific thread to my subscribed threads, so all I have to do is click the link, and I'm off!
If you need any help, and I'm online, feel free to message me. I may not know the answer, but I'll help you find it!
Welcome to 3FC! I hope you find it as wonderful as I have

I personally am a calorie counter. I've tried so many diets and pills, and failed that I just want to do something to get myself healthy and habitual about my eating and exercise. Diets work for some, not for others. So browse around
Good luck!