Try setting the OT’s first six midi tracks to 1-6, so that they match the Nord Drum’s six channels/sounds. Set the note for each one note 60 (C4?). This way, each track will play correctly if you add basic trigs. After setting up that starting point, you can plock different notes, allowing you to play each Nord Drum sound chromatically. Some of the most fun CC parameters (on each respective channel) to get you started with plocks and LFOs: tone decay (CC50), tone spectra (30), noise decay (21), noise filter frequency (14).
I don’t have an OT yet, though I think I get the basic architecture - love my ND2 to pieces - so any OT owner, feel free to correct me if I’ve got it wrong.
Edit - just realised AdamJay’s quote covers some of the same stuff - hope what I wrote is helpful
PS, if you don’t already have one, grab a pad controller for the ND2 - I have the Nord Pad and also an Akai MPD controller when I want to mix it up - it’s so expressive playog live - you could easily approach it from a different angle and play it live into the OT’s pickup machines