I'm not sure any good advice I grew up with applies to this future we're stumbling into. Learn practical skills like gardening and fixing your stuff. Buy as little as you possibly can. An affordable set of basic tools is a great thing to keep for life. Consider the state of the world long and hard before you decide to bring children into it. Never talk to the police.

Practice trusting your gut. Practice it on small things.

One way to do a gut check is to imagine yourself making decision A, then imagine yourself making decision B, and for each pay attention to whether you feel stronger or weaker.

Almost no one knows how to do the job they are hired for. You'll have a trainer at almost every job. Apply for things you don't think you are qualified for. Most people figure it out as they go.

Think where you would like to be when you're thirty, then work backward to now and figure out what you need to do to get there.

Also, don't be afraid to take chances.

Don't worry too much if you fuck up. You have more than enough time to fix just about any mistake. You're still young, it's OK.

Have a clear set of long-term goals for yourself, ie career, where you want to live, and what you want to be. Set deadlines for each with steps on how to do it.

It's time to start building the rest of your life. It won't be easy but you'll be doing it for you, so make it worthwhile.

Start buying a few shares of VTI every pay period. Use any left over cash to buy SPYG. Ignore the gains or losses, the market has never not gone up (eventually). Thank yourself later.

Max out your 401k when you get a decent paying job. But make sure you hit every pay period to maximize your employer contribution.

Consider using mass transit where possible, bike if you can, more or less avoid a car/insurance. If that's not possible get a cheap car like a used Nissan leaf ($7000 in my area, costs a few dollars a month to charge using a wall outlet and extension cord)

Minimize unnecessary expenses like using food delivery services. Meal prep on the weekends and make enough food for a week.

If you do all this for 10 years or so, you'll be in a really good spot financially. Buying a house will be a decent prospect, your VTI and SPYG will be making money, your taxable income will be small and you will have built up the ability to splurge on things without it making much of an impact on your finances.

I've been following the YouTube channel Chris invests and he gives lots of similar advice like this.

Start a diary, and review where you're at in life every once in a while.

If you're in the US or generally any country that's becoming authoritarian, get a passport. You never know how bad it may get.

Find a topic that you have interest in and master it. This will only get harder as you get older.