Hello, I'm vegan and it's actually been easy.
Have you ever eaten meat in your life ?
I have, I am just worried about my health as well. Veganism reduces the risk of heart disease.
I don't know if that is true because I read ketogenic diet also reduces heart disease and you eat more fats, proteins, and less carbs. 
Well the diet has been deemed appropriate for all stages of life including infancy and pregnancy. Lots of medical associations agree, including the British Dietetic Association.
Maybe, I just don't think its for me; to drastic of a change for me, I could be a vegetarian but not a vegan. 
Well it is more than just diet, there is also ethics involved. Animal agriculture is environmentally damaging and unsustainable.
Not if you do it properly, if you buy cheap, non organic, factory farm meat then yes it is environmentally damaging and unsustainable.
Besides animal welfare, animal rights, and ethics, there are many reasons to go vegan. Another one is that organic produced products and meat still contribute to animal agriculture.