Did post this in the newbie bit no one has posted their for 6 months...

Hi I float around in the back ground of this forum and read as much as I can. I have read the primal blue print but need to ask how do you get you fat/protein/carbs ratios from.. Or do you see what suits you? I have started using myfitnesspal app to log my food.. I have sorry been eating primal for over a month but want to start tweaking it. I know cutting dairy is from paleo ,but do people suggest to do this to fat fat burn? How do you work out how many calories a day you have?? I know some or maybe all these are answered on the forum but I've read so much on so many different threads it all seems to start to confuse me as some people say one thing and others seem to say another .. Just a bit of help in the right direction