good on you for catching this early and wanting to address it. Speech therapy definitely works for stuttering, especially blocking, and at 13 you're at a good age to learn techniques that can really help. if getting to in-person appointments is tough with school and stuff, Better Speech is worth checking out since it's online and you can do sessions from home. From what I've read it makes scheduling way easier and connects you with licensed therapists who specialize in stuttering.