Help with booting macOS from hard drive

Hello everyone.

I currently was able to boot from my USB with the EFI and macosrecovery folder. I was able to go through the whole installation process and able to boot up into mac os. I mainly followed this tutorial: https://www.youtube.com/watch?v=tOAbA4UL-Kk&t=911s

The thing is that I am only able to boot up to macOS through my USB (meaning I choose my usb drive when on the F12 menu screen thing). So my question is, what step am I missing? How can I fully install macOS in order to boot up into it without the need of the USB?

Any help would be appreciated and sorry if I'm not explaining myself correctly, I am very much new to this.