Thanks for the hints! The YouTube channel is still too advanced for me to use, but its daily nature makes it low pressure and I can watch at most one episode a day. At a certain point I will understand more and more.
There are also other very nice podcasts, but before I want to study actively the most I can. I'm at Pimsleur 2x17 (it is too slow so I either skip every other lesson or go through only half lesson). I found only three levels, then I will move to Michel Thomas. That will also be finished very soon so I need more material. Germanpod101 is less active but also very good. I have to dig more into monolingual German resources for foreigners, maybe there is indeed something interesting.
I also ordered the methode 90, Both the versions with 50 and 90 lessons (I have the audio for the last one). Those are small books with some good material (the old spelling is not a problem for me). I can study an extra 10 minutes in a parking place before coming home I guess
the 50 lessons one I can keep on my nightstand. I want to become a good intermediate and then consuming lots of resources. I'm not planning formal grammar studies for the moment (with drills and so). I'm afraid the FSI courses is way too dry for me, so if I have other alternatives I will pursue them.