Hi Robin, first of all congratulations and welcome aboard. I am also new to vegetarianism, started at the beginning of November and am learning more all the time, there are some awesome websites around with easy recipes, you just need to start looking around.
The main thing is eating right, be diverse in the fruit and veggies you consume everyday, being a vegetarian is far from boring. Lentils/beans added to salads (e.g. chick peas from a tin) makes for a good filler and a lot of the meat replacements can be fun to try. The best thing to do in a house of meat eaters is have a stash of things like lentil burgers or veggie sausages that you can add to the side of your plate. For a lazy meal I oven bake vegetarian spring rolls or grill a mushroom (and sometimes stuff it with sautéed onion, veges etc).
Good luck and let me know how up I go.