I didn't really like the title of the HN post either, but I don't think it needs much change. Just drop the "I'm 17 and" part and do "I wrote this guide on hwo CPUs run progra..."

The "I'm 17" part just felt irrelevant to me in a technical work. I.e. it's either technically correct or it's not. However, I can see a strong argument about why it should be in the title. If you care about meta details of the work, it's certainly different and interesting to be produced by someone so young. I suppose part of this is my own life experience talking, and very likely means I'm projecting. When I was a teenager I hated divulging that to others on the internet because they treated me differently when they found out how old I was.