Anyone can learn to make soup from scratch. It's pretty cheap to make, filling and there is a sense of pride in being able to make it yourself.
Any time you cook chicken save the bones/carcass to make broth. You can keep your broth in the freezer and take it out as you need to use it. It is the basic ingredient of a lot of soup recipes. What you'll need to do is take the chicken carcass (all the meat taken off the bones) and put it in a big pot (4-6 quart size). Peel a carrot or two, a stick of celery or two, an onion or two, some garlic cloves and add them to the pot. Add water to the pot to cover all the ingredients. Bring to a boil, then lower the heat and let it simmer gently for 30-45 minutes. Then you're going to strain the liquid into another container and discard all the bones and cooked veggies. That's your broth.
You can do this with chicken bones, beef, pork, shells from shrimp and so on.
If you want to make a roasted vegetable broth, take a bunch of veggies (I try to clear out my veggie drawer in the fridge regularly, so I use up the older stuff this way) carrots, onion, celery, garlic, mushrooms, zucchini and so on - whatever you like - and toss them with a little bit of olive oil in a roasting pan. Turn the oven on to 275-325 F and roast the vegetables for about an hour. Then take them out of the oven and add them to a pot of water, bring to a boil and then lower the heat and simmer for 20-30 minutes. Strain out the veggies, and what you have left is vegetable broth.
To make a simple soup, start with a few strips of bacon, chopped up in a big soup pot. Start cooking the bacon, then add chopped onion, celery, carrot (chefs call this combination "mirepoix"). Let the vegetables cook gently, then add some chopped garlic and a bay leaf. Open a can (28 ounces) of diced tomatoes and add to the pot. Open a can of red kidney beans, drain off the juice and rinse them before adding to the pot. Add some more chopped veggies (leftovers will do). Add your chicken broth. Bring to a boil and turn the heat down to simmer. Let it cook until the vegetables are starting to get tender. Add some chopped potato or elbow macaroni and let it cook for 10-15 minutes until the potato/pasta is al dente. Add some chopped parsley or cilantro, whatever you like. You can add some leftover chicken if you want or leftover sausage or anything else you like. This will make a big pot of soup for you to enjoy for several days, so you could leave the meat out when you first cook it, and then add some meat just before you have a bowl of it. The time it takes to chop the vegetables is an investment, because you'll have quick and easy meal for several days.
If you have a slow cooker, you could do up a recipe of soup on the weekend (leaving out pasta if you plan to use it because it will go mushy) put the crockery in the fridge over night and then start it in the morning before you leave for school and it will be almost done (10 minutes for the pasta) when you get home.
Same goes for chili. Brown your ground beef, chop onions, celery, garlic, rinsed beans, diced tomatoes and seasonings, etc. Add them all to the crockpot and pop in the fridge overnight. Start the slow cooker on low in the morning and you'll have an amazing batch of chili for several days.
If you want to roast a chicken in the slow cooker, you can do that too. Just have all your ingredients ready in the crockpot in the fridge and set it up first thing in the morning on low and your dinner will be ready when you get home. Spend a little time de-boning the chicken after cooking so you can make some fresh chicken broth, and use the leftover chicken for your soup or for chicken sandwiches. $10 for a whole chicken may sound like a lot of money, but you can stretch it over several meals and it becomes very economical.
For lunches and stuff: hard cook some eggs for egg salad sandwiches, have tuna on hand for tuna sandwiches. Grilled cheese sandwiches go great with soup. Make sure you have fresh fruit (apples, oranges, bananas) for portable snacks. If you aren't allergic, pop some almonds into a small baggie to have a bit of a protein boost through the day. If sandwiches get boring, you can always switch from bread to tortillas to make a wrap.
Anything you can make from scratch will be healthier for you and less expensive than pre-made convenience foods.