The lasagna noodles won’t cover the entire baking dish; they expand as they absorb liquid and cook, so when the dish is done, the lasagna will fill the pan. Look for oven ready lasagna with the rest of the dry pasta in the grocery store.
Green enchilada sauce is more mild than red enchilada sauce. Red enchilada sauce can be substituted, but the flavor will be spicier.
Lasagna can be made the night before, refrigerated and baked the next day. Add a few minutes of bake time.