Bip39 Tool. Entropy values have to be sourced from a strong source of randomness. This suggests flipping a fair coin, rolling a fair dice, sounds measurements etc. Do NOT use phrases from textbooks, lyrics from tracks, your birthday or steet handle, keyboard mashing, or nearly anything you believe is random, https://princedirectory.com/listings13072647/bip39-seed-https-linktr-ee-bip39-fascination-about-bip39-word-list-pdf