Yes, it is legal to play. Just make sure you are informed with all the risks.
Yes, If the casino in question have Trustly, you can use it.
It refers to casinos that you can play on that contains no license for germany, however just make sure the casinos have any license.
The most common licenses are MGA and Curacao. Atleast for Europeans.
Here! at our page we will always provid our best casinos.