If your goal is learning, you do not need to download the massive ECC 6.0 installation files. SAP provides free access to similar systems through modern cloud initiatives.
This is the modern way to get a practice system. SAP offers pre-configured IDES instances in the cloud (AWS, Azure, or Google Cloud). download sap ides ecc 6.0 free
SAP software is proprietary, and official access is generally restricted to registered customers and partners. If your goal is learning, you do not