Remeber though, the ambiguity of the Force is why we all love the Original Trilogy. I just assume that she learned it when she probed Ren’s mind. I also assume she was driven by the dark side, or heard Vader’s voice about giving into hatred to destroy Ren. I tried the overdub and really liked it, but it was too on the nose.
I look at it as she learned on the job. The very first force user learned the same way. If she is who I think she may be, it would make perfect sense.
In short, I think saying or showing too much is not the way to go.
Just my 2¢