When you followed the measures over now you need to be able to generate and verify the correctness of BIP-39 seeds your self (with negligible guidance from tools like binary to hex to decimal converters). The best way to retrieve extended non-public essential from extended community important + learn seed https://canvas.instructure.com/eportfolios/3396498/ricardooxtv236/opening-the-world-of-bip39-a-comprehensive-overview-to-mnemonic-expressions-and-word-checklists