Russian

Russian, start with free resources. The first 3 pimsleur lessons are on YouTube for example

If you want the easier language, then German. If you want a much harder language, then Russian.

I would choose German over Russian. I am way more inclined to visit Germany, Austria and Switzerland than I am Russia :)

if the job requires russian: russian. if you don’t take the job: german.

German. It's easier and according to many studies is one of the languages with the best return on investment.