Theory and sheet music do the seemingly impossible task of turning sounds into something readable on a page. Music theory breaks things down into something logical. Put simply, music theory comprises the “rules of music,” and while you can always go against theory, you should at least know the rules before you break them.
Understanding note values, triplets, arpeggios, and time signatures will help your creativity and give you a solid foundation for understanding music as a whole. Best of all, music theory crosses over all genres, styles, and instruments. If you learn it once, you know it forever.