Sounds like you are looking at becoming or adapting a raw Vegan rather than a vegetarian unless you also consume dairy products such as milk, cheese, yogurt, etc
If you are consuming dairy products then you probably do not have to worry about supplementing your nutritional requirements like a true vegan, especially a raw vegan would as both B12 and D type vitamins are found naturally in or supplemented by law in most dairy products. If not then you will have to remember to take a decent multi-vitamin containing both B and D vitamins.
As for eating food raw it is basically the same as eating it cooked with a few exceptions. Since cooking makes fibre more digestible and easier to use you will probably have to increase the amount of high fibre vegetables you eat in order to achieve the same benefits. Most raw vegans I have known make a lot of smoothies out of raw fruits and vegetables and you can probably find "recipes" on the internet.