Installing Oracle 19c server on Windows 7
Windows 7 is not a supported operating system for Oracle 19c.
The documentation states that it is only supported for these versions of Windows:

Windows 8.1 x64 - Pro and Enterprise editions
Windows 10 x64 - Pro, Enterprise, and Education editions
Windows Server 2012 R2 x64 - Standard, Datacenter, Essentials, and
Foundation editions
Windows Server 2016 x64 - Standard, Datacenter, and Essentials
editions
Windows Server 2019 x64 - Standard, Datacenter, and Essentials
editions

Even if you are able to get the listener functioning, you will likely recieve other errors with normal database usage that will just cause more headaches in the future which is why it is very strongly NOT RECOMMENDED to install Oracle on an unsupported operating system.