String Theory has been folded into (no pun intended) Quantum Field Theory, which fixes some of what the original theory got wrong. Have you seen any videos from PBS Space Time, on YouTube? If not, I’d highly recommend the following videos on the subject (probably in this order):
I sure do love the implications of our universe consisting of interactions between excitations in a bunch of fields, the rays of which carry energy much like a plucked string. If that’s right, it could be rendered as audio; we would be listening to the music of the universe. It might not be good, but it would be beautiful! 😂