How long will it take to learn the drums?  

Highland-style drumming is quite different from the forms played in band/orchestra or drum & bugle corps.  Rolls, accents and flams are an integral part of this style as well as the snares of a Highland drum being set higher than that of normal snare drums.  Most learners (with drumming background) are sometimes taken aback by the way Highland-style drumming is written.  But again, with a little perseverance,  they get over the change in styles.