How would a Buddhist advise on this subset of problems of motivation?

Some call Buddhism psychology, so maybe it can help -- me. This sense that doing something -- let's take a difficult but generic example, learning sanskrit -- is a wonderful, exciting idea; but one never gets started with it, because there is no tangible psychological or material benefit from it -- for whatever reason [you won't find anyone new to talk with, most texts are in translation, no-one will care, etc.]. What remedy is there for this?