Nostr is a different way of looking at social media and money. Everybody has a different trajectory to achieve this understanding. Using nostr means the user understands the need for privacy, decentralisation and freedom. Don't bother with those who don't. Understanding public and private keys in the Nostr context is like understanding 1 to 10 in supermarkets, there is no way to simplify it, you need counting skills. Making things simple will attract simple people which will hurt Nostr and overload relays with nonsense.