i want to be a vegetarian but do not know what to eat or not to eat
You must abstain from all  (red meat, poultry, seafood, and the flesh of any other animal). Why do you want to stop eating meat? 
i think in the long run it will be more healthier for me if I do not eat meat
Many people adopt Vegetarianism for many various reasons. I actually gave up meat for 9 years when I was younger. 
i tried it before but I found eating only vegetable and bread was unfulfilling. I like to know what kind of food I should start out with
Many variations of the diet exist: an ovo-lacto vegetarian diet includes both eggs and dairy products, an ovo-vegetarian diet includes eggs but not dairy products.