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.