You MAKE yourself eat vegetables. If you are motivated to be a vegetarian, and remind yourself when you eat of how good this is, eventually you will get used to vegetables and like them.
Stop buying artificial "meat" substitutes. They are factory made and NOT good for you. Avoid them.
Instead, learn to cook vegetarian meals that are tasty. It takes a lot more cooking to eat healthy as a vegetarian. And it is more fattening too.
You will need protein. 50g a day.
Eggs, nuts, cheese, tofu, soybeans and quinoa are all complete proteins. Eggs are high in cholesterol, as is cheese, so go easy on those. Nuts are very healthy, but only a small amount on any given day unless you are a naturally-skinny person.
You will also be eating rice with legumes for your protein (legumes = black beans, pinto beans, navy beans, kidney beans, garbanzo beans/chickpeas, and lentils). THESE will be your MAIN source of protein.
Buy recipe books. Go to your local bookstore. I have "Spilling the Beans" and that book has some excellent recipes.
I'm not a vegetarian, but I go meatless at least 1-2 times a week. And my sister used to teach vegetarian nutrition.