The USA has tons of debt too. Per person it's unmanageable. The only reason this is okay (and we keep talking about Europe) is that the USA can print more money and Europe can't. Is this right?Yes. The picture is even more stark when you look at Japan, where the government has more than 200% debt/GDP, but pays record low interest on bonds. Monetary sovereignty matters.
However, I wouldn't use the term "print money", simply because it clouds the issue. After all, you can also look at it this way: all the US government debt is money that has already been "printed". That view is essentially equivalent, because "paying back" a bond simply means transforming one government liability (the bond) into another government liability (reserves at the central bank). Whether that money is held in the form of paper, reserves at the central bank, or longer maturity bonds is unimportant.
What is important is that the private sector has already made it very clear that it does not intend to spend that huge amount of money any time soon, so for the purpose of analyzing what is actually happening in the economy the debt is irrelevant. After all, the debt is a stock, and what we're mostly interested in - things like GDP, or the payments that go towards employment - are flows.
Yes, there are interest payments. It is sobering to learn that a monetarily sovereign government chooses the interest rate that it pays on its liabilities. If the political will was there, the US government could just stop issuing interest-bearing bonds, and otherwise continue as usual.
Inflation, you worry? Well, the only first-order effect of such a move would be that the interest rate falls to zero. In theory, that could have a (very small) inflationary effect, but since the interest rate is already essentially zero, even that is unlikely to happen.