Hi Lardylad – Welcome to the forum and sorry you have been struggling with the website. If you use the Tabs next to ‘Home’ at to top of the page, you will find lots of information on the various low carb diets options, has various items including looking at things like Hidden Sugars / what fats to include; there is a good FAQ and quizzes to help you make and assessment of your current situation.
Yes, if you want to make a start on the Fast 800 before your book arrives, you can certainly follow the principles of the diet and limit your calories to 800 per day. The principles are of course low carb / high fat, so you should avoid all sweet things, anything made with cereals, root veggies especially potatoes and parsnips, rice, pasta, bread, etc. Include small amounts of dairy and good fats like olive oil, nut oils etc. and nuts, seeds, avocado. Eat plenty of above ground veggies / salad. Good hydration is essential, so drink at least 2lts a day. I’d suggest keeping things simple, so for breakfast think eggs, or yogurt with some nuts and a few berries, lunch think a salad with a protein source and dinner a protein source and veggies, just be sure to count the calories in everything you consume. Once you get the book, you can either follow the meal plans, or continue to create your own menus.
Like you, I’m not a whizz when it comes to the techy stuff, but there may be someone on the forum that can offer more guidance to you on that front and hopefully they will be along soon. Meanwhile, do please make the most of the forum and join any thread that looks relevant to you.
Best wishes on your quest and hope to be seeing you posting positive results soon.