So how fucked am I for starting to learn cpp as my first language, or is this a later down the road thing to worry about?

I don’t see why you should be concerned, except that no professional software developer is limited to use one specific programming language.

Even if you pay attention to the disaster prophets in the crowd, which are mainly comprised of fanboys implicitly and explicitly promoting their pet language/frameworks, C++ dominates all aspects of the computing ecosystem, which means that in the very least the whole world needs to maintain existing C++ projects to continue to work. See COBOL for reference.