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.
Yes I agree with you, young people should start investing, especially those who are still dependent with their parents because years from now, bitcoin price will get higher. When the time comes that they're already independent, the savings or profit from investments will really help a lot. The only thing from what you've said that I disagree is about the "go all in". That's too risky.