Congrats on the purchase! Those two are a lot of fun! Enjoy!
However, while they’re clearly meant to go side by side and are a VERY powerful setup together, like @Lum was saying, I’d also suggest you limit yourself to a couple of machines on the Machinedrum first. And the new unofficial firmware is AWESOME! Although I loved the MD before, something just clicked for me with the X.04 firmware.
Monomachine is a whole different beast. Two years in I still haven’t really created anything worthwhile with it. 
Luckily I’m in no hurry here.