When people say Communism had never been tried it's because communism is the end goal. It's the place we want to get to. A stateless, moneyless, classless society where everyone is truly equal. That's the ideal.
And Socialism is how we get there. Socialism is a scientific method of governance. It's not the insanity of "free-markets" nor is it the dictate of an autocrat. You need hospitals. You put the force of govt behind building hospitals and staffing them. You have a giant landmass so you need mass transit. You don't twiddle your thumbs waiting for the market winds to blow just right. You invest in building it. Because you need it. Because it's good for your people.