I had a quick look. Iām hearing the first 2 bars like this:
1 + 2 + 3 + 4 + 5 + 6 + 1 + 2 + 3 + 4 + 5 + 6 +
D U D D D D D D U D U
See if that sounds right to you. Iām sure there are some variations throughout the song, but this could be a starting point.
I think which beats get accented is important, I will let you figure that out