AOC is a Far Left Loon, and I don't think she's gonna change. Can she get elected on such a progressive liberal platform? I think it depends on who she runs against, if it'd another DJT with more negatives than positives that she and the democrats can demagogue to death, then yeah I suppose so. And the GOP has to be the more moderate and sane party IMHO, they can't be too extreme on their side either, meaning they need to compromise on things like abortion, and gun control to win the votes of the vast number of independent voters in the middle. The Far Right will ruin their party as surely as the Far Left is doing to theirs.
The democrats were scared of losing to DJT with Sanders as their guy, and it might be sorta the same thing with AOC. There some similarities, but is she more electable than he was? I don't think so as long as she plays to the extremist policies that Sanders did, thus losing a ton of support from the Indies. Not unless she gets some help from the GOP if they run a bad nominee and push policies that most Americans do not support.