Congratulations! It’s such a great device and the Mk2 makes the workflow that much better to grasp and learn thanks to its few extra buttons
My tip would be, as others have said, to go slow and do the basics first from a musical point of view without worrying too much about understanding, learning and using every feature of it right away. The more you play with its basic operations, the more it all will become muscle memory and the easier it will be to expand into the more complex features / interactions between features without losing the plot.
Another tip is conceptual: Remember that each Recorder is its own track (independent of the playback track), so when you record audio into track 1 for example, you’re ACTUALLY recording it into recorder track 1, which you can then set to play back on Track 1 if you desire so (by selecting RECORDER 1 as the sample source of the track). So the way I think of it is, I’ve got 8 audio tracks and 8 recorder tracks that I can mix and match as needed. The track buttons hence have dual functionality, A. to access the OT’s 8 tracks (by pressing the track button) and B. to access and record onto its 8 recorder tracks (by selecting a track and hitting REC1 / REC2 to record).
if this is confusing just ignore it , helped me big time though to realise that the recorders are their own tracks (instead of thinking: “I’m recording audio into track 1” I now think: “I’m recording audio into recorder 1 which I will make play back on track 1 by selecting it in the samples list of track 1.” :))