
German I found actually harder to learn than Japanese, oddly enough. It has a very complex grammar. Even tougher is Russian. Japanese is a bit more systematically straightforward and once you struggle through the more basic stuff, reading manga becomes gradually easier. Furigana, usually present in manga, helps lots too.
Just for god's sake, don't learn languages that you don't have a lot of interest in. Actually, don't learn anything that you don't have interest in. You should've seen all these people in my Japanese class who were going through living hell with that course while I was in heaven, despite having a similar level of prior knowledge. Mostly because I was fascinated with the language itself and they were not.
Err... Out of rant mode... Someone... give meh more Azumanga... love it... really love it.... Chiyo-chan... evil