How to install opencore

Hi so my native language is romanian so i dont know very much english. So i want to install opencore on my macbook mid2009 and when i intall the macos image on the usb its stuck on "bytes written:0,0mb" and for thoes who say i need to wait i waited 2h and nothing hapend, so i go to my pc to make an usb to install mac os big sur normal then i wanted to install opencore files to usb my usb is not showing up when prompted to select the disk i want to install the files And only the sd card is showing up and i dont know what to do can you guys help me? And please note that my macbook is running macos from the sd card because the flex cable that connects the hdd is broken so in 5 weeks the new cables arrive. And i need the laptop dor work and macos el capitan is not that great when i want to install apps.

submitted by /u/lales23
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