Take it one step at a time. Make sure you’re comfortable with each step before you move onto the next. Let’s start by alternating 16th notes on the floor tom and bass drum.
While playing that, we are going to alternate between the ride cymbal and the bass drum. So the four 16th notes that repeat are; ride, bass, floor tom, bass.
Then with your other hand, play your other tom on 1, snare on 2, and the tom again on 3.
This is what it looks like when you put it all together.