If the language of your preference doesn't have a driver for a database you have chosen, there's no need to worry. Writing a driver is more fun than you could ever think. You'll learn a whole lot and will be able to get to know features of a DB that you may have been not aware of. Clojure gives you a possibility to write a very simple, yet perfomant code. Mongodb gives you many interesting opportunities just as well. You'll be surprised how well they play together. Build your stack and get familiar with the tools you use.