Oh wow. Congratulations.
My first suggestion would be to spend a month or two only concentrating on the MnM. There is a lot of exploring to do. I think different people will enjoy different machines, and it’s much like the Octatrack, where you end up using it differently than other people. But, it’s much quicker to learn than the OT, depending on your experience with Elektron machines.
For pads, I love the Ens machine. Set one osc to 3, next 7, third at -3 for chords.
For acid like bass lines SID machine.
The rest is learn the gain staging, and how the filters work together. The one pole filter in the effects section is my favorite part of the MnM. Along with the regular filter, it’s just amazing for finding that sound in your head. LFO’s are quick and easy. Use them on everything.
SIN machine for 808 bass drums.
And for full on melodic, i would say go straight to Poly mode. Don’t wait till you’ve had the machine for 3 years like I did.
One more thing