Well, there is:
https://en.wikipedia.org/wiki/King_and_pawn_versus_king_endgame
General principles of pawn endgames (and other endgames) are explained by GM Naroditsky pretty well in this playlist:
https://www.youtube.com/playlist?list=PLT1F2nOxLHOfQI_hFiDnnWj4lb5KsviJ_
Its not complete yet though.
Other than that check out the usual suspects of threads about endgame books ?
And you cannot really blitz out endgames like that, I dont think. You need at least time to see what your opponent has done.
Maybe I need to slow down or something.
Maybe it’s because we’re really making like 15 moves in a few seconds and I just don’t think it through.
But there’s got to be some tips and tricks to make sure I stay ahead.