if you can controle your right wrist i got customers that do 325km on 11 liters
If you keep a steady 50 km/h, then yes.
But not possible when you are on the motorway and are required to maintain 100 or 120 km/h to keep up with traffic.
Once more, the MP3 is designed as a city machine although I have used mine for touring. But I got tired of playing "where's the next fuel station" as soon as 100 km have passed by and got a real bike designed for doing distances.
If you want my opinion, I'd look for a solid example of a early 3rd gen 500ie (circa 2014-2016). They have depreciated enough to be affordable and see if the motorcycle lifestyle appeals to you. If it does, then you can always get something better later on. And if it doesn't, you can sell it with minimal investment or loss.
Definitely take a motorcycle course. Even with the car license, in Europe generally they don't let you just get on without taking a beginner's 8 hour course just to give you the basics.
And don't skimp on safety equipment, especially helmet wise. There are no spare parts for your head, so don't go bottom dollar. A decent basic helmet will cost you a few hundred and a great helmet can easily exceed a thousand. A helmet may not be the sexiest thing in the world, but just like buying a Volvo when the worst happens you want the best possible chance of walking away with little to no bodily injury.
In other words, don't buy your motorcycle gear from the same place you buy your groceries.