I just have one. Smart people learn from their mistakes. Wise people learn from the mistakes of others. You won’t live long enough to make all the mistakes yourself.

If you are male, you can get male pattern baldness in this age, but you can stop baldness by taking finasteride.

Lift wieghts and or do some other physical activity. Its good to have two hobbies; a mental one and a physical one. The muscle you build now will be with you for the rest of your life, and its mucb easier to do it now than when you are middle aged like me.

Dont focus too hard on girls, just live your life and enjoy the experiences and relationships you build with all people; everything else will follow.

Travel, with a focus on the physically taxing things that are harder to do when you are older.

Invest what money you can, compound interest is real and it is the path to wealth (eventually).