Where do I start?

Hey, welcome to MFP! I really like these three links for people starting out because they cover a ton of the basics you'll want to know:

http://community.myfitnesspal.com/en/discussion/1080242/a-guide-to-get-you-started-on-your-path-to-sexypants

http://community.myfitnesspal.com/en/discussion/1235566/so-youre-new-here

http://community.myfitnesspal.com/en/discussion/1296011/calorie-counting-101

My advice is to go for a walk and clear your head and frustration. I am a firm believer in getting your head in the right place so you can commit to your goals.

Having said that can you be a little more specific as to what you are confused and frustrated about. Is it my fitness pal in general or something else?