Short distance diesel or gasoline?

Hello, I am aware that there are probably already similar topics, but these are partly already very old again and I did not want to dig out years old posts. With me is a new vehicle purchase and I ask now the question whether I should get a diesel or petroler. A way to work is 11km via highway only 50 and 70 km/h zones, driving time about 15min. Otherwise I drive also only shorter distances (in the neighboring place to the parents, shopping etc…) län My driving performance per year is therefore estimated to be below or just over 10,000km. When looking at vehicles, a dealer told me that it is no longer so problemmatic to drive short distances with a diesel. But did he also say that you should be on the road a little longer on a regular basis or that you should bring the car to higher temperatures on the motorway for a little longer time? Is that true? Could I do that? I don’t think much more about getting a diesel? Or would you rather put it on a petrol truck or maybe one with LPG?