Forget about everything else and just put everything on bitcoin. You are living with your parents, they pay everything for you, you got nothing to lose. If I was living with my parents, I would save everything and buy bitcoin monthly. If BTC doesn't keep rising you can still reach the 21 BTC holder group, then save this and retire in 10 years when the price makes you a millionaire.
Go all in on regret later. You are on a privileged position to profit from high risk high reward moves. No risk no win, and BTC is the best long term high risk bet.
I think young people shouldn't save money for the future at all. It their best times of life, they have to spend them on some bright crazy moments, not the savings as the old ones do. And bitcoin is a great chance for young people to earn some money by working for a signature campaign and spend it on what they want now. Bitcoin is now worth quite a lot and maybe it won't cost more. It is better to use it now then.