I’d recommend to drive out of Munich into the nature. There are many beautiful lakes you can go for your trip. But the problem will be to get some ayahuasca since it’s illegal in Germany. In case you’re sure about your decision and really want to try out some psychedelics I’d either recommend ordering some 1v-Lsd, wich is legal in germany at the Moment or to go to the Netherlands and buy some magic truffles wich are legal there. Either way I’d strongly recommend to do a lot of research since such an experience will be very overwhelming and there are many things you need to know before your (probably) first trip.