I don't like the kind of so-called studying done at a desk.
I don't like the conventional kind of studying done at a desk.
もっと長く言いますと、 “Using English in real conversation is fun so I like learning that way. However I don’t like just sitting at a desk and endlessly studying vocabulary and grammar in preparation for exams and tests.” (英語を使って会話することは楽しくて好きだけれど、試験やテストに向けて机に向かって文法や単語をひたすら勉強することは好きじゃない。)