Regarding the cheese: Yes I would say stay clear of all 'proper' cheese even if labelled light/lowfat and stick with the fat-free or nearly fat free dairy until you reach Conso. The thing is, I found that Philly extra light actually tastes like salted Quark, but contains lots more fat (can't recall what it is). If you're desperate you're allowed a scant tablespoon a day or so. On the other hand if you manage to get your Quark from Asda or Budgens (Goldenacre brand, my personal fave) or Tesco (in rectangular tubs), it's firm and spreadable like Philly, but it's unlimited and so much better for you! I am now in Stabilization and I could have the Philly if I wanted but I am sticking with the Quark.
Another thing: read EVERY food label if you're buying anything that you've not checked before. Different brands have different interpretations for 'light' or 'extra light' so you might find one 'EL' actually has more fat than another 'L'. And most low-fat diet foods have loads of sugar or thickener/starch etc in instead, another pitfall if you but anything prepared or flavoured. You're best off sticking to the basics and adding the flavour yourself!
Good luck I'm sure you'll get there!