New comer

Welcome!

Here are a couple of links that I think you’ll find very helpful:

http://community.myfitnesspal.com/en/discussion/1234699/logging-accurately-step-by-step-guide/p1
http://community.myfitnesspal.com/en/discussion/1080242/a-guide-to-get-you-started-on-your-path-to-sexypants/p1

The first covers accurate logging and some of the tools in MFP to help you make things easier. The second discusses caloric needs and setting goals. These are two of the most commonly-referenced threads on MFP; tons of people point to them as being sources of great info when you're just starting out.

For more friends check out these threads, which are fairly popular:

http://community.myfitnesspal.com/en/discussion/10176797/comment-here-if-you-want-more-friends#latest
http://community.myfitnesspal.com/en/discussion/10324944/hi-looking-for-friends-motivation#latest

I, personally, don't know a whole lot about PCOD or thyroid issues but I know there are some people on here who might. Try a search in the forums. Good luck!