Trying to install macOS Sierra on a 2017 MacBook Pro

Background of the issue: A 2017 MacBook Pro was reset by the seller. I tried installing the OS, but encountered errors during installation. I am trying to install macOS Sierra through Recovery mode. Here are the steps I carried out on the MacBook Pro that has the issue. 1. I reformatted the disk, with a warning of data loss. 2. cd /Volumes/Macintosh\ HD 3. I downloaded the macOS Sierra 10.12.6 InstallOS.dmg using the curl command. 4. I mounted the InstallOS.dmg with hdiutil attach InstallOS.dmg. 5. I tried to install the Install macOS Sierra.app from the InstallOS.dmg to Macintosh HD volume with the following command.

installer -pkg /Volumes/Install\ macOS/InstallOS.pkg -target /Volumes/Macintosh\ HD

The OS seemed to install, and it said it will restart. The restart process was going fine, until it stopped with a circle and a slant line inside it. Now the OS will not load. I am only able to boot to Recovery. Also when I select "Reinstall macOS" option, disks are not displayed.