You could start at stage 2 but still do the grazing thing...... grazing means little and often....... if you think you'll eat too many nuts/seeds at a time, stick rigidly to a handfull, then put the packet away in a cupboard. Make yourself a long list of all the foods you can eat ( all meats and fish, most fruit and some veggies)..... then you can go shopping and plan some menu ideas....... take a look at the thread that xclusive has done with the photos of their meals...... that will give you some ideas to get started.
You may find you have a headache in the first week..... it's perfectly normal and willgo away. Drink plenty of water.
Good luck

Nicki