I don’t know, for buying and selling Coinbase seems to be pretty user friendly. You can sign up for an account, link it to your bank account and start trading in minutes. Not sure how much easier it could get.
But even so, the average Coinbase user's reaction to receiving their first Bitcoin is "Now what do I do with it?"
Both of my parents had this reaction. And the only use they've found so far is to gamble it on altcoins like they have in the past with penny stocks!
So the whole "transferring coins or buying goods and services" part has a looooong way to go.
Which is really all cryptocurrencies are good for at the moment. Nobody in their right mind would use anything so volatile to buy/sell goods and services.
Fwiw, this was outside the US.