Yeah, for the love of god dump everything on its SD card and on the internal memory of the console.
After copying everything important, just turn it into a normal console (as much as possible) and just play with it. Consoles were meant to be...
The Louvre guide on this console is probably more recent than the one on the cartridge! (I don't know how old is the latest eShop update, it's the 1.3 but the Nintendo website has only documented the 1.1 from 2014, and this console is copyrighted...
Man bought a $20 a gauge at Amazon that was all fancy digital went to hook it up did t detect shit, then went back and bought an analog worked right away