i had the same fear about nose presses too, but you just kinda need to hit the bunny slope and just mess around with nose preses the whole way down.
as for falling goes i would say try not to stick your arms out to save your self if your are gona bail, but just kinda roll with it. the bails i took were really mellow and soft, i mean i wasn't flying down the slope pressing so it wasn't bad at all. just go a bit slower and get a feeling for em, prob one of the safer things to learn if you have some common sense. GL