Q: why can't I understand learning an instrument just by "playing with it"? I'm so stupid, like how do you learn chords and all that just by playing with it?
A: i'm not sure which instrument you're using, but, try this: if it's a keyboard, try playing C, E, and G at the same time. If it's a guitar, try pressing the D, G, and B strings all on the second fret at the same time. then try the same thing but switch the B string to 3rd fret B string and keep the others the same