Generally speaking, it should be comparative linguistics, such as the analysis of some new language phenomena; Or the study of Russian culture, proverbs, folk stories and movies; There are many subjects about literature, such as the study of a poet's works or the evaluation of the characters in the book; In addition, the exploration of translation skills is also good. I wonder if you want to write in Russian, too. If so, you'd better look for information before you decide, otherwise writing without Russian information will be full of mistakes.