I set up 3 templates for recording Maschine in Reaper that you can try here if you want:
https://forum.cockos.com/showthread.php?t=194950
It's not an intuitive process to figure out how to record MIDI from Maschine into Reaper by trial and error, but I recommend reading the manual and learning the Maschine workflow and then recording the MIDI output into Reaper for further editing. But these templates are already set up to do it, so you can just choose a drum kit and start recording. Good luck...