As someone who played/plays guitar, 1000x this. This also somewhat aligns with my earlier comment too. As I’ve mentioned in other threads here; the curiosity about electronic music coming from a band setup is that he space you use to produce is also the place that you noodle, jam and also write. In my head that’s something that is taking a bit of getting used to. (as does the fact that electronic music folks write not only “their” bit but also all the other surrounding parts.
An acoustic guitar is a great way to think of it. In my guitar days I had (and still have) my runaround guitar for “pick up n play” stuff. And then you have your full rig for shows & recording. This makes it easier to be in one mode or the other. When you pick up the runaround, you don’t really think you have to “do” anything. If it happens - cool. But if not, you had a bit of fun and that’s what matters.
To keep that basic feel of songwriting, I’ve taken to loading up Ableton with nothing but a piano sound and finding a progression. Then I build a song around it. This might be a bit odd, but it somewhat resembles the split between runaround and recording gear from my band days. And I have the Circuits as well. Initially I thought I’d end up recording the output of these boxes, but actually I quite like not bothering 
I think working out what your noodling instrument is (ideally a pick up and play one) is a great way to start. That instrument should be there for play and recording as a bonus. Then, once you’ve got that, in effect you’ve done all you “need” to. Then it becomes about what you want to do with it. But as @Martebar says - sometimes the first bit is enough.
