There are a lot of functioning socialist states. You don't have to imagine them. They are happier, healthier and have better infrastructure than the United States.
If you’re thinking Scandinavian countries they are mixed economies. Most successful economies today are mixed economies.
On the sliding scale of welfare state socialism, Finland and Norway have the greatest degree of public investment. Angola would be on the other side of that spectrum, with almost no public services or redistributive programs offered.
Socialism is very well defined and it's made nebulous only to claim virtues it doesn't have.
Scandinavian countries aren't socialist. They themselves say they are not socialist and a simple google search for "are scandinavian countries socialist?" will show you that the consensus is that they are not.