Welcome!
I do not have the MM, however, I have flown the Mavic Pro in -20f on commercial jobs. As mentioned above, keep your battery warm until ready for flight. Do not fly if the humidity is high, when there is any mist or wet snow in the air. When you start your flight, lift off to about 2' from the ground and hover for a minute or two to let your bird warm up. As mentioned above, watch your battery for any sudden drops in voltage. Do not wait until your battery level is down before landing.
When you land, do not put your bird directly into a warm vehicle. I use a small plastic garbage bag and I wrap it up tight, then put it in the vehicle. This will keep it from condensing after going into the warm vehicle. The bag will protect it from the moisture in the air. After a few minutes when it has warmed up then you can take it out of the bag.
Try small flights at first and learn your birds characteristics when flying in the cold, then expand as you learn. There are also lots of youtube videos about flying in cold weather. Watch them and learn from others mistakes. Also watch videos about drone crashes, again to learn from others before you make the same mistakes.
Stay Well, Stay Warm, and Fly Safe!