I lied, stole from my parents, cheated, scammed, humiliated others and laughed, threw rocks at people with the intent to kill. All by the time I was 10 years old.
Later it got much worse. Later I actually thought I was smart.
This is the great thing about being young: you're so arrogant and stupid and unreasonably confident that you have 100% confidence that everything you do will fit right into the picture. A million piece jigsaw puzzle where you never pick up the wrong piece as you try to put it in the right position.
But this part is good: you have no money, so it's really hard to blow it. And if you destroy a relationship, then good for you - you were too young anyway.
This I can say from my experience. I proposed to a girl when I was 19. Then when I was 21, 22, 23, and 24. All to different women.