[Avicebron]

I'm going to share my anecdote, because it may help, but everyone is different and your mileage may vary.

I'm a MechE by classical training (professionally I actually work doing software/network stuff, don't ask, DNS (screams internally)), so here's where it stood out for me:

https://en.wikipedia.org/wiki/Hydraulic_analogy

Internalize what this simple example represents, think about why that's mathematically interesting, and start looking for where it applies elsewhere. You too could be roped into doing systems engineering at scales you didn't think people haven't already figured out.