You might find it helpful to start out gradually. It can be intimidating to sit down and plan a whole week of meals (never mind two weeks or more!) when you aren't used to cooking much. Try to get confident with making one or two things during the week, even if it is boiled pasta with jarred sauce, pre-made meatballs, freshly grated Parmesan cheese and a bagged salad, before adding more items.
You had asked what items people keep on hand in their pantry, but honestly, that will be different for every family, based upon what they like to eat. It won't do you any good to keep cans of tomatoes on hand just because I do, unless you would actually use them in your meals. If you find a recipe that you like and want to make again, the next time you go shopping, buy enough of the packaged, canned, and frozen items to make it once or twice and store them in your pantry and freezer.
For example, if you look at the chicken tortilla soup recipe below, you could keep the tortilla chips, canned chicken broth, tomatoes, Rotel tomatoes, frozen corn, and possibly some chopped cooked chicken (frozen if you have planned a meal short-cut...see below) in your stash. If you have the seasonings left over from making it previously, then the only "fresh" items you would need to pick up would be the cheese and an onion...both items which can keep for a fair bit of time as well. Rice or pasta make good pantry items so you have a base for your meals, but again, if you don't eat them much, it might not make much sense for you to have them.
While I might not plan all of my meals ahead, I do like to find short-cuts for meals so that the dinners I make can be assembled more quickly. I mentioned pre-made meatballs and jarred sauce above, but you can also buy rotisserie chickens (sometimes they are even reduced in price for quick sale) that you can remove the meat from and freeze in batches. That way, any time you need chopped, cooked chicken in a recipe, you will have it ready to go. You can also make your own short-cuts for meals by poaching (cooking in boiling water) multiple chicken breasts or else roasting two chickens at one time (it takes relatively the same amount of energy and if you buy them on sale, it is economical as well.) Cooked, shredded chicken is useful in so many dishes like casseroles or soups.
You mentioned liking Mexican foods, so I will give you a couple of meals ideas that our family enjoys.
- The first one is for tortilla soup. It is an all-in-one meal that would provide ample leftovers for lunches or dinner the next night. One of the best things about it is that you can keep all of the items on hand and just start dumping them into the soup pot.
Chicken Tortilla Soup
3-14 oz. cans chicken broth
3 or 4 cups of cooked, chopped chicken meat
2-14 ½ oz. cans regular or fire-roasted diced tomatoes (I really like the fire-roasted), undrained
2-10 oz. cans Rotel tomatoes with diced green chillies, undrained
2 cups frozen corn kernels
1 Tbsp. vegetable oil
2 garlic cloves minced
1 medium onion, diced
1 tsp. cumin
1 tsp. chilli powder
2 Tbsp. Worcestershire sauce
Grated cheddar cheese and tortilla chips for serving
In a Dutch oven or soup pot, sauté the onion and the garlic in the vegetable oil over medium heat until tender, about 5 to 10 minutes. Add the broth along with the shredded chicken, undrained tomatoes, Rotel, corn and seasonings. Add salt and pepper to taste, though I never find I need to add anything to it. Bring to a boil and then simmer over low heat at least half an hour to blend the flavours.
When ready to serve, place lightly crumbled tortilla chips and shredded cheddar cheese in the bottom of a soup bowl. Ladle soup over top. Serve.
- The second meal idea is Baked Spicy Chicken Tacos. Again, using pre-cooked chicken (possibly already cooked and in the freezer) and having the onion, taco shells, can of refried beans, the packet of taco seasoning, the cans of tomatoes and peppers in the pantry, and hopefully some cheese in the fridge, you should be able to put dinner together in record time.
- The last simple meal idea I have is for a Beef and Mushroom Spaghetti Sauce. (Don't worry! You can omit the mushrooms if you don't care for them!) The great thing about this is that you can make it ahead (perhaps on a weekend) and then freeze it for use a busy weeknight where you simply heat it up while you cook some pasta to toss it with. If there are only two of you eating it, a recipe like this might serve you for two meals...cook it one night and cook half a pound of pasta to go with what you eat that night, then freeze the other half for another night. All you would need to do that evening is boil another half pound of pasta and make a salad. What is also great is that you can use this as spaghetti sauce, but you can also toss it with some cooked pasta, place it in a greased casserole dish, and then top it with some grated cheese (cheddar or Parmesan or mozzarella) and bake it in the oven until the cheese melts and browns slightly and the casserole is heated through.
Good luck! I think that it is great that you are looking at learning a new skill. It just takes some experimentation to find out what you like and then practice to perfect your techniques.
Beef and Mushroom Spaghetti Sauce
1 lb. of ground beef
1/2 medium-sized onion, minced
1/2 cup sliced fresh mushrooms (omit if you don't care for mushrooms)
2 cloves of garlic, minced
1 can (16 ounces) diced tomatoes
1-6 oz. can tomato paste
1 bay leaf
3/4 tsp. dried basil
1/2 tsp. dried oregano leaves
1/8 tsp. pepper
Salt added to taste
1 lb. of pasta (spaghetti or even macaroni or medium shells if making into a casserole)
Top with Parmesan cheese
Add all together and simmer for 30 minutes. Locate and remove the bay leaf and throw it away. (They can be sharp and it isn't advised that you eat them). Serve over pasta with freshly grated Parmesan cheese. Makes four cups of sauce.
Note: For a variation, combine sauce with cooked pasta such as elbow macaroni or medium shells. Place in a greased casserole and top with cheddar cheese. Bake in a 350 degree oven until cheese is bubbly and casserole is heated through, about 30 minutes.