Messi is just getting started. This is a long-term project, after all. He'll be in Miami for a few years, perhaps the rest of his career, as he will be the face of American soccer and MLS going forward.
On the field, he's proven he's still not far off the peak of his powers, terrorizing MLS and Liga MX defenses since arriving. And there's no doubt that the off-field pull is still there as fans all over the country are lining up to see Messi play.
So, at this point, what motivates Messi? He's won everything there is to win, accomplished everything there is to accomplish. What else can there be?
Well, he could claim yet another Ballon d'Or this year, having led Argentina to that famous World Cup win. But, in Messi's own words, he doesn't really care.
"During my career, I've said this many times, [the Ballon d'Or] is a very important prize because it's a great recognition, one of the most important things, but I didn't give it that much importance, because the most important thing is the collective trophy. I have been lucky enough to get many trophies in my career, but the most important one was the World Cup.
"If I get it, perfect, but if not, then no problem, I have achieved many objectives and goals during my career, and now I have new ones with this club."
For Messi, Miami is a land of opportunity. It's a chance to build something of a normal life for his family, even though that'll never quite be possible. It's a chance to be just a little bit less famous than he's been since he was a teenager, to give his own kids a glimpse of something resembling real life.
On the flip side of that, though, it's a chance for Messi to redefine a sport in a country that is ready for soccer to be propelled into a new era. It's been a long-time since Pele arrived with the New York Cosmos, and much has changes since. Hell, plenty has changed since Beckham himself showed up two decades ago, altering the trajectory of American soccer forever.
At the end of this, whenever that is, there will be a pre-Messi and a post-Messi era of American soccer but, once again, Messi isn't too worried about that. He's just going to do what he's always done in the ways he's always done it. The result will, ultimately, speak for itself.
"My decision took many factors," he said. "We thought it over with my wife and sons. I don't think much about [changing American soccer], I'm just here to continue to play and enjoy football which I have loved all my life, and I chose this place for that.
"And I can tell you today I am very happy with the decision we made, not only from a sporting perspective, but for how my family lives every day."
One month down, many more to go. Messi has been welcomed to Miami with open arms and he has accepted the warm embrace; let's see what he does next.