I can't add much else to what has already been said. Again, have the list available. I found what has worked for me so far is making sure that I have enough of the basic staples that make up this food plan so that you can throw something together relatively quickly. Again, it might make your trip at the grocery store a little longer since you will be reading a lot of labels at first but after you make those adjustments I have found this an easy food plan to follow. I wanted something that I could follow for the rest of my life so I spent some time researching it. As far as I am concerned, I am a Lifer!
The main thing to remember is that this is: lean meat, low glycemic index fruits and vegetables in "normal" portions/servings, low fat dairy and cheese, no sugar and minimal salt with healthy but limited cooking oils like canola and olive oil. Once you see that then you can shop without a list because you will know what falls into that category.
I rarely eat out because almost every restaurant except for a strict vegetarian or health food type restaurant cooks with too much fat (of the wrong kind) and even adds sugar to the meat (which I have heard that fast foods do!) I am not sure how strict you want to take this but I feel that NO food plan will work if you don't follow it the way it was intended to be followed. That is why I spent time researching the different ones out there.
Welcome and good luck on your journey!