Read BIP32 and BIP44. Also learnmeabitcoin.com under HD Wallets and Derivation Paths.
Walk through the open source software implementations step by step.
As a user, Bitcoin Explorer (bx) examples, iancoleman’s site code, bitaddress
generate wallets from the command line, bash scripts using Bitcoin Bash Tools etc.
Have a thorough understanding of what these tools are doing as a user before trying to replicate it as a coder











