I’m Currently Vegetarian, Thinking Of Going Vegan. Any Tips?

I’ve been Vegetarian for over 6 months now and am considering going Vegan soon. I don’t really know where to start. What foods do you have to keep away from if your Vegan? I know you can’t consume any animal products, so gelatin, eggs, dairy etc. I’d really appreciate it if you could list the guidelines and give a few tips on being Vegan; especially how to get enough nutrients into my diet (particularly iron, protein, B vitamins etc.) I’m 17 years old, female.
Thanks in advance!