Repeat each line multiple times. You will need to be grade 5-6 level for this sheet. There is a lot of syncopation. Drum & Bass is generally fast paced, so start off slow and get the beats right first and then gradually up the speed until they are sounding fast.
The slashed Hi Hats on the 5th and 6th line mean to play double strokes on those Hi Hats. For example 1 slashed Hi Hat = 2 notes, played with a double stroke.