The beat the song is built on is one bar, played through bars 3-12, 14-33 and 35, and 4 more places -- 78% of every bar the kit plays. Learn that one and the song is very nearly finished.
It is played on hi-hat, snare and kick, counted in thirty-second notes. On its own it scores 21 out of 100 -- straightforward -- and the thing that decides that is how fine the subdivision is.
The whole song is 44 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
There is not much to reduce here -- the room opens it near enough as written, at 40 BPM, and asks for it clean before it moves.
Two tempos only, 40 and 38 BPM, and the gate at each is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on hi-hat, snare and kick, in 6/4 at 38 BPM, counted in thirty-second notes. It is written out above, and it covers 78% of the bars the kit plays.
Bars 3-12, 14-33, 35 and 39-40, and 3 more places. The time is kept on the hi-hat to start with, and it changes 1 time over the song.
21 out of 100 on its own -- straightforward. The song as a whole is 44 out of 100 -- a fair first song -- with how fine the subdivision is the part that decides it.