Re-installing macOS Sierra on a MacBook Pro (Mid-2010)

I have a MacBook Pro (Mid-2010) that I was experimenting with by running un unsupported macOS via some help from someone who altered the way the installation happens so that the unsupported OS can be installed and ran. It was fun and worked great but now I want to repurpose the MacBook Pro to a machine to edit videos. I have been trying to create a bootable USB stick that I can install the InstallOS Sierra app on to but have run into wall after wall. After downloading and running the dmg, I have the Install macOS Sierra app in my applications folder. I went to create a bootable usb stick and transfer the app to the USB stick via terminal commands but it just hangs and I have to restart the computer. I have downloaded a program called Disk Drill but have experienced the same issue. Disk Drill will erase the destination drive and make it bootable. Once it says it is creating the installation files, it just hangs there for hours until it finally times out. It does give an error that points to the app being possibly corrupted but I do not think that is the issue. I deleted the first download then re-downloaded the dmg but got the same results through the terminal and Disk Drill.

I am at a loss as to what could be going on. It seems that once the USB stick is made bootable, it shouldn't be an issue getting the app over and prepping it so that I can use it to install the OS. Of course, I am not savvy with the inner workings of MacOS but nonetheless, I am stumped. Is it possible that what ever this person did to alter the code to make unsupported versions of MacOS has affected the ability of the OS to create an install disk? Do I have any other options other than finding a copy of macOS Sierra on CD/DVD and install it that way? Are there any options I am not thinking about that would help me?

Thanks in advance!