hi, I'm in year 13 and taking both languages (both edexcel). I'm studying intouchables for the film bit but I'm doing un sac de billes for the book. I'd say it's more interesting than you think it's going to be and I've really enjoyed doing it in class.The best thing to do is read the English copy first as it helps with understanding a lot better than going straight for the french version.
I personally find french easier however German isn't too bad. I think the hardest thing in German is all the different tenses and cases but once you get your head around it, it's fine. In terms of usefulness, i'd say both are good languages to have and German is especially good for things such as business and you could say that you'd stand out more as not as many people do it.