I was taught French from my grandmother when I was younger. Because I learned French as a second language, I know the grammatical ins and outs of the language and I can teach in the way a native speaker can't, because I learned the same way you are. Je peux aussi enseigner aux francophones. (Or Russian speakers if you are very patient or like immersion.)
I have a bit of experience helping people with English in real life, I have a friend who came to America speaking only Creole and French. I'd also someday like to become a language teacher or an interpreter, so I'd be more than happy to help someone out with English!