disclaimer: you might already know these things, apologies if so!
this is maybe where the learning curve will feel most steep. the grid doesn’t do anything when you plug it into Logic. it’s not a pre-programmed MIDI interface like a Push or Launchpad. the grid relies on applications and scripts to interpret its presses and to tell it what to display.
on a laptop or desktop, these applications (nb. the site is down at the moment, apologies!) are primarily written with Max/MSP – Max can shuffle MIDI or audio into and from Logic, so you’ll just need to run Max alongside Logic. Max can be run for free, you only need to pay for a license if you want to save edits to an application or write your own applications.
so, depending on your comfortability with routing MIDI inside Logic, that’ll be a first hurdle. this’ll be useful to know anyway and it’s not specific to grid – if you wanted to plug your OP-1 into Logic to send note data, you’d have to work through the same logistics. Max should just show up as another MIDI source/destination in Logic.
was there any particular use-case (a video, a document, etc) for grid that you were most attracted to? we can totally help contextualize things, if needed 