Plant based cooking can be very easy, quick, inexpensive, and healthy. Basically, for a meal you want a proteinish thing (beans, lentils, nuts, seeds, seitan, hummus, peanut butter, etc), a starch thing (rice, potato white or sweet, corn, bread, tortilla, pita, etc) some veggies (frozen are good).
Breakfast: something like oatmeal with peanut butter, soymilk, raisins. A banana and/or an orange. Lunch: I make extra whatever dinner was and bring it to work, with some fruit. I get a salad or veg soup to go with it from the work cafe.
If you gain some knife skillz (youtube), veggie cooking takes about 2 minutes prep time. Plus everyone likes to watch people chop stuff up really fast.
Enjoy the journey.
Learn to fix a couple breakfasts and a couple dinners, and pretty soon by adding to them, you have an arsenal of meals. Make sure you get enough calories on days you eat veggie. It's easy to undereat.
Btw, when I can't figure out what to cook, I just google 'vegan carrot asparagus potato lentil', or whatever foods I have in the kitchen. Something awesome always pops up, there are great blogs out there!!