Kolja,
I suggest you have a look around the wannabes forum. Plenty of other people are in the same position as you and many posts deal with the 'yes or no' issue at the moment, as it is of concern to a lot of wannabes.
You'll find some people saying that the situation is hopeless for quite some time to come and others that say the industry will recover soon and there will be more jobs.
The truth is, nobody knows. All the figures being discussed are speculations and nothing more; everything depends on when passengers want to fly again, and that's impossible to predict.
Therefore the only advice one can really give is this: if you *really* want to go for it AND have the money, go ahead. As you know, there's nothing like flying....
If you're prepared to put up not only with the strenuous training but also the prospect of waiting for quite some time to get a job - absolutely do it.
It seems you have some contacts in aviation. Use them, and bear in mind that training is only the start.
Viel Glück!
Mail me if you want.