I was 15 stone 3 when I started and I'm now under 13 stone. I also found it really confusing to start with and lived on fruit and yogurt the first day til I got to grips with it. Read your food optimising book again, and give your consultant a ring if you're stuck. The webpage is helpful, and this is the best site for SW. You'll soon get the hang of it and wonder why you didn't ditch ww years ago.
Green days are vegetarian, so you can fill up on potatoes/pasta/rice/beans/quorn etc. I lived on green days for the first 2 weeks. Bread and milk/cheese etc are healthy extras on red and green days.
Red days are for meat (low fat) so you can fill up on low fat sausages (most are very low in syns) chicken breast, bacon with no fat, fillet steak etc.
Eggs are free on both days, as is fruit, most veg and diet yogurt. Peas and sweetcorn are for green days unless you have them as a hexB on a red day.
Good luck!