My family will definitely be able to take advantage of my work, because I always show them how to work with cryptocurrency!
In addition to showing what you are doing, show them how to use the private key and, above all, where you have it hidden. It's best to divide private key into two parts - give one to the one person from your family and the other part to the other person. Only together they will have access to your address. This will greatly increase the level of security in the event of an unpredicted accident.