[mistahenry]

I'm probably C2 comprehension, C1 speaking in German. I self-taught to high B2 (based off placement into that level in a Goethe Institut Intesivkurs) in 15 months of 2 hours a day. I studied 1-2 hours per day on average and did not miss a single day.

2 hours a week to B1 in German as an English speak seems totally impossible. I was probably B1 in 6 months at the level of study I described. I studied 5 years of Latin prior to starting so the case system wasn't an additional learning curve. Your pace honestly seems standard.