Well I'm still fairly new to this myself, but I found it easiest to start with the foods I alreay like that are veggie... or can be converted to veggie easily enough like:
Spaghetti
Macaroni (if you still want to eat dairy)
Baked Potatoes with all the fixings
Pizza
Grilled Cheese & Tomato Soup (there's that cheese again, but YUM!)
and just about any Mexican or Chinese dish you can think of.
Then add the new foods like tofu or soy-whatever in one per week. That way you're not overloading with new foods all at once, and you're more likely to stick with it. Good luck!
love,
mom