Ehm ^^ Thanks!
I started by doing my drawings by hand, but it certainly was more easy when I managed the "grafic tablet" thing. Was my first try in this game jam, but after some practice it worked quite well. As for the program: I just randomly googled "free illustration program" and tried a few. I certainly will try out some more now that I have the time. I didnt look for youtube videos, but I think I will do this, too, now with less pressure xD