Yeah, vegan is no animal products. The things you'll miss the most are dairy. Some vegans still eat honey and some don't. It's just personal choice.
Vitamin B12 is the only thing that is really hard to get in the vegan diet. You have to eat fermented foods like miso, tempeh, ... some people say that seaweeds have some of it. You don't need a lot of B12. You can take supplements for it if you are worried. Your body also stores it for a long time so if you aren't getting enough it will take awhile to show signs.
If you come from a family that eats a lot of meat and dairy you will probably have to totally rethink how you eat and plan your meals until you get used to it. Do your research first! I'm quite serious about that. French fries are not a great vegetarian food.
Oh yeah, soy milk is usually fortified with B12 too and the chocolate or vanilla stuff is pretty good. Just find a brand that you like.
www.vegansociety.com has some good information and if you want to evaluate the food that you are eating try
www.fitday.com it is free. Each day you log in what you eat and find out if you are meeting your requirements for the day/week. I don't think it's completely accurate. Every BODY is different and different nutrients work together (or against each other) for assimilation. But it's a good general guidelines. Look up chickpeas and lentils for amounts of iron and calcium. You might be surprised. And look up multi-grain toast for protein. Add some peanut butter to that and you have a nice complementary protein.