What
>>2 said is very important. I had to become pescetarian so I could save money not buying so many B-12 supplements. Talking to a doctor is always important when drastically changing a diet over a long period of time. As for what to eat, Amie's kitchen makes vegetarian freezer meals for in case you ever find yourself short on time and needing food quick. The main factor is if you are still living with your family or not. If your family is still making your food and you are the only vegetarian things get complicated fast., so waiting till later in life might be better depending on your circumstances.