At young age you should focus only on 2 things, career and money.
Career: Try to learn as much as possible in whatever you do. Take initiative and show enthusiasm for anything new. Anyone can code, but people who take initiative and has the ability to learn new things quickly are the one who make it big. Build a good relationship with your colleagues. Your network is your networth.
Try to get as much clarity in life as possible. Talk to seniors, learn about their journey, why they made certain decisions. Trust me having clarity in life as to what you wanna do in life is a cheatcode.
Money: No matter how much you make, you can always save money. Invest that money into index funds. Investing early on in life will put you years ahead of your friends. Compounding is real. Here's a simple rule you can follow: 50:20:30. Spend 50% on basic needs, 20% on your wants and invest the rest 30%.
Don't buy expensive things just to show off. Literally no one cares.