The beat the song is built on is one bar, played through bars 1-3, 5 and 9-13, and 17 more places -- 38.3% of every bar the kit plays. Learn that one and most of the song is already under your hands.
It is played on ride, snare and kick, counted in sixteenth notes. On its own it scores 37 out of 100 -- a fair first song -- and the thing that decides that is the independence between the hands and the feet.
The whole song is 69 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
A part this hard is not learned by playing it slowly and hoping. The room opens it on its simplest reduction -- the timekeeper alone, at 89 BPM -- and adds the notes back over 3 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 89, 104 and 119 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on ride, snare and kick, in 4/4 at 119 BPM, counted in sixteenth notes. It is written out above, and it covers 38.3% of the bars the kit plays.
Bars 1-3, 5, 9-13 and 15, and 16 more places. The time is kept on the ride to start with, and it changes 17 times over the song.
37 out of 100 on its own -- a fair first song. The song as a whole is 69 out of 100: demanding, mostly on the independence between the hands and the feet.