just sitting here trying to figure out wtf is going on with their fickle personality

Then you in for a ride.
I read the translation of the novel and it gets worse, no Mather how much you read some paragraphs you just can't get it, why they jump into random topic or totally different scene. It's torture really.
In this series everyone is all over the place.

Mannn as I contemplated whether or not to read the novel. given the fact that I enjoy the plot so far, is it still worth trying?

I thinks yes, but do make use of the word Try, experiment and teel me if you didnt get lost while reading...
I persevered and I'm still persevering cuz the plot moves foreward super slow but I already invested to many brain cells on the novel to not see it through...Also because of the plot's speed maybe the webtoon gonna take another season till you see any progress.

Really? I didn't find it to be all over the place. But it is a long novel where things take a while before it gets unravelled, but I think it's really worth the read. And this novel really focuses on the MCs mind, and how transmigration could be which is so realistic and refreshing. But things really get explained later on including why their personalities are like this