how can my younger brother who is a junior in high school start preparing for the real world?

plz don’t say SAT prep

building web3 security infra @ getshield.xyz 🛡️ • commander-in-chief @ ancientwarriors.xyz ⚔️ • nf.td/eman • emanft_.twitter

Getting a job, regardless of what it is. I spent my early 20s labouring on building sites and working in factories and it taught me so much.

As others have said, building good habits around self reflection (meditation, journaling) as well as finances (saving, investing)