I 23 am the oldest of five siblings and I am a full time student. I also have a part time job in my field but when I complete my after degree my employer will take me on full time. I make enough from part time to pay for school and put money aside. My siblings range from 20-10.
Both of our parents work full time. I have taken on a lot of the responsibilities for keeping everything running in the house. I do the grocery shopping, the laundry as well as making suppers and doing meal prep so everyone has lunches ready to take every day.
I also get all my siblings to do their part with regards to household chores. For example my youngest brother is responsible for feeding and walking the dogs. So I make sure that there is dog food in the storage and poop bags on the leash.