I only know of 2 Turn over passes. One of them controls the card to the top, the other controls the card second to the bottom.
The first is simply a Hermann Pass action with turning over the deck as cover. I'd recommend this one because it's very easy and good for beginners.
yes, but it is still unnatural to laymen. if you asked them to turn over a deck, they will almost always turn it over sideways.
People seriously don't care about this type of stuff, because they expect the magician to handle a pack of cards different to them. As long as you don't stiffen up and start acting awkwardly when you do the sleights, these moves seem perfectly natural.