Some suggestions

You need to prepare a will in which you would state how you would like your assets to be distributed (this can be expressed by percentages or dollar amounts). And you need to have executor, to whom you must provide details of properties you own (stock and bank accounts, insurance policy numbers, etc.)

If you don't have a will, then in the case ... typically your assets would go to your spouse, with the exception: when you purchase an insurance policy you can specify how the payment would be distributed (you can list as many people as you like)