The pay is 52 euros per block hour as the final step, I believe. It starts at forty-something initially, I think. You will most likely not fly more than 700 block hours per year, so you get 700 x 52 € = 36.400 €/year. Using
Lohn- und Einkommensteuerberechnung you get about 1.900 €/month net. You are probably better off at wizzair.