Is it really going to be helpful to try and work on playing range vs range while being primarily a 1/2 NL player with the occasional 2/5 shot (trying to grow a roll to transition to 2/5 full time)? Only reason I ask is that I'm really looking to improve my game on every level possible while also not getting in over my head or trying to tackle concepts that are either out of my reach or above my comprehension.

Also, most typical 1/2-2/5 villains are so lolterribad, it kinda seems like overkill. Like, they don't even understand the importance of position or hand selection, so that usually (at least to me), makes those typical villans' ranges so freaking wide at pretty much every point in the hand, not to mention that they prob aren't even ranging hero,...run-on sentence.....

Tldr : Waste of brain power or not to work on range V range at 1/2-2/5 ?

Live poker? Yes, it's a waste of time to work on range-vs-range play, precisely because no matter how good you are, they will not be able to correctly put you on a range, and you will not be able to tell what range they put you on.

But! If there are strong regulars in your games, it could still be of value, to improve your winrate against them. In practice, most regs at small stakes aim to break even against the regs and work on maximising profit against the fish, and you'll be in good company if that's what you do too. On the other hand, the fact that the regs largely ignore the other regs means that they are very exploitable, and if you do start exploiting them they will not adjust well to it!

tl;dr: Yes, focus on the fish for now.

Edit: and when you do decide you need range vs range training, you might like to try the software I'm writing. It's not finished yet, but when it is, you'll find it on rangevsrange.com. Please forgive the incomplete version currently hosted there. I'm currently rewriting it as a web application, from an earlier complete version that ran as an desktop application.

Against very weak players, being careful about constructing your ranges is not super important. You don't need to worry about bluffing too often in a spot because it opens you to being c/r profitably, for example. Mostly you can just optimize the EV of your holding. Considering the villain's range is always a good idea though. That information is always useful when making borderline bets, calls, or folds.