Well that assumes that a terminally online person would want to deal with people at all, especially when you run a paranoid, doxing website.
I've been an immigrant myself and probably will be again soon, but yeah, I put very serious effort into learning German because I wanted to be functional in society. Even in as a small place, relatively speaking, to English, French, and Spanish, German is, there can be wild differences in dialects to the point where you can barely understand it anymore. This is true for me for far east German dialects and for Swiss ones. Platt and even northwestern dialects of Dutch I can pretty much understand but it is very strange to someone who wasn't exposed to it. I was told my German was very standardized. I was like well I wasn't raised in a dialect lol.
In fairness, Serbian is one of the more difficult languages to learn: https://www.fsi-language-courses.org/blog/fsi-language-difficulty/