What is their source of income?
Are you saving for a house and that's why you live with them? Would you consider living with a friend and paying monthly rent to them instead?
It's easy to guilt trip you while you are in the house. If you see them less, they can't pester you for money. I appreciate it's maybe not the norm in your circles to have less contact with family, but I'd say in my experience, the more 'professional' type jobs people hold, the more independent from blood family they tend to be. I have some friends who see their siblings and blood family weekly if not more often, and it was a total revelation to me, as amongst my school and uni friends, living within 100 miles of family would be rare, nevermind living with them or weekly in-person contact. Generally the view of me and my peers is that family too close to you life and business = stress. People stick their nose in where it doesn't belong, such as what you earn and how you spend it. Your example and many stories on here confirm my view.
It may sound like a lot but... Maybe try having more distance? You may like it. It sounds like you don't have much in common with your family members and they're dragging you down. You can't choose your blood family, but you can choose how you interact with them.
When they ask you for money. I would say start sending them job ads. Start with stuff like 'Amazon warehouse staff needed, no experience required, flexible hours, immediate start'.
Don't be afraid to say 'I'm sorry, it's an expensive month for me, I can't afford it' or 'I would have to dip into my savings for that' or even 'money is locked away in a fixed-term account and I can't take any out without being penalised, maybe if you pay me 200 up front to pay the bank fees, we can discuss' or 'what happened to the 400 I lent you in August? I don't recall seeing it paid back'
However, all that is hard to do while you live with them.
You're very young and it's hard to have enough balls to say no and cut off the apron strings at this age. You'll find it easier later in life. But please, start trying.
Likewise, find a mentor. An older woman/man 35/40+ who maybe comes from a similar background, or whose guts and attitude you admire. Spend time with them. Let them be a positive influence in your life.