The question is why would you want to? It's incredibly expensive and what would it achieve?
It was done 50 years ago entirely for political reasons. The USA felt miffed that the Soviet Union had launched something into space first, especially after its own first attempt collapsed back on to the launch pad and blew up, So JFK issued the challenge to put a man on the Moon "before the decade is out" in the hope that America could do that first.
Which it did, yay, amazing, 6 times (and another attempt that went wrong but a triumph in its own way that the astronauts still got back safe and sound), but having done that, so what? It cost a fortune, people were losing interest now it had been done, and there was the Vietnam War to pay for. So the last 3 Apollo missions got cancelled.
OK, so it can be done. But it cost a fortune and you need to find a good reason for doing it again to justify the expense.
Meanwhile, we HAVE been back, just not with people. If you just want to learn more about the Moon, unmanned probes are much cheaper and they can do more now than they ever could before.