Thanks for your replies!
I just cannot help it, I'm highly mistrusting of facebook and the likes (though I might give instagram a second thought...).
For the time being I have chosen a totally different approach. I applied as a teacher with 2 community colleges, maybe at least one of them is interested and I can start from there. Additionally I'm spreading cookie samples around, with the help of my mother. A few people already asked to place orders. Alas, I cannot do that, as the regilations are highly restrictive in Germany and I could get in so much trouble for selling cookies without being an officially acknoledged baker. But the kindergardeners of my nephew already expressed interrest in taking a class.
I know that this is a long process, but I'm positive that something will come of it sooner or later. My mother started her quilting classes exactly the same way and now has 1-2 every week.
And maybe someday I will also find someone to help me with starting a blog