SkyPie

I tried when I had a cooking class at school once. 

Well, pasta tends to be easy if you have the ingredients premade.

Dried pasta is a staple most places, so you probably have at least one variety on hand (straight spagetti for example) - just heat some water in a pan, add a little salt (or a stock cube, if you want to give it more flavour). bring to the boil and simmer for 20 minutes (fresh pasta is the same if you have it, but only takes about 5 minutes to cook). If the water in the pan looks to be getting low, you can top it off with more from a kettle.

In theory, you could make your own sauce, but nobody does - just drain the water from the pasta, replace it with sauce from a jar, then return it to the heat (low to medium, not full) to warm the sauce though... and done.

a meat sauce (say, bolognese with ground beef) tends to be more work, but a lot of people will batch that - make up a big pan, then portion it out into containers and freeze the excess. makes life a LOT easier if someone in your household has already done that and you just need to defrost it and then warm it though.

carbonara sauce (a creamy mushroom sauce with bits of bacon in it) is easier; ideally you want pieces of chicken to go with that, but precooked chicken breast pieces can be bought frozen, so you may already have some in the freezer (if not, why not ask your parents if they can pick some up?) and the process is then almost exactly the same - cook pasta, add sauce from a jar, microwave some chicken pieces (so they defrost then heat though) and add them to the same pan once the sauce has heated though.  If you don't have the chicken pieces though, the jar sauce is usually good enough

British are very fond of things on toast; that can be quicker and easier if you don't feel like making a full meal. Simplest is to use a grill, and toast the bread on one side, then (after turning it over) add a slice of cheese (or better yet, a slice of ham then a slice of cheese) and return to the grill until the cheese is melted and starts to run. Really fast and easy, but still tasty

My younger half brother and sister. They give me headaches, hurt me with their words, I have to forcibly drag them out of the room when they won't leave me alone (which is very difficult and leaves me exhausted because they are quite heavy), and they're breaking all the doors in the house with the force they push on them. It's more difficult to deal with because it's only my oldest sister who can help me out, reason being my second oldest sister and my mother are out for most of the day.

Sounds like quite the hand full alright.. cant you talk to your mother about their behaviour?

She already knows about how they act, but she can't do much about it because she is recovering from heart surgery. And my second oldest sister is busy taking care of our mother, cooking, driving, and taking care of money stuff so she can't punish them as often as she should. And when she does, it doesn't work.