Hi,

In my opinion you should go for French.

It really just comes down to what your interests are. If German calls you more, learn German, and it’ll be plenty useful. If it’s French, then go with French. Sure, there’s plenty of statistics about which language is spoken more and where. But it doesn’t make sense in my opinion to learn, say French if you don’t really like learning it.

German is mostly concentrated in Central Europe and a few other places where some German dialects are spoken (like in some parts of Brazil... but good luck to find the couple of people who can actually speak that instead of Portugese)
Total that's about 100M speaker and it includes 80M Germans in Germany and Germans living abroad (Germans are like the Australians of Europe: really great travelers)

French is spoken in 57 countries (Francophonie) which equates roughly to 250M people who can understand and speak French or a French dialect.
29 countries and 11 dependencies have French as an official language.
A countless number of international organisations use French as an official language (African Union, numbers of international sport federations, Olympic committees, Etc.)
Go on holiday in some paradise island and you're better off with English and French than English and German.

Hope this helps.

Good luck.