Stuck on the last step

I‘m trying out opencore legacy patcher for the first time in order to make my macbook pro 9.2 finally usable again. I‘ve successfully followed all the steps from a YouTube tutorial I’ve watched… well up to this point I can click on the accept button as much as I want but the Mac won’t start installing

Every other option in this menu works (I’ve already tried that) But whatever I do it won’t start installing Sonoma 😭

I really hope somebody is able to help me on this one 🙏🏼