I would suggest practicing at a home game dealing the cards and get some experience under your belt than going to apply at the casino were you wan to deal I am sure it will give you the edge over the others that have no experience I had a friend that was a holdem dealer and di very well the hours are long but you can also an immense amount of experience by watching
Just one word of advice - if you're going to "practice" in home games, make sure you're learning the right techniques. If you're just overhand shuffling and plonking cards in front of people you're pretty much wasting your time.
Learn to shuffle
properly (riffle and strip method, there are videos teaching it on YouTube).
Learn what method of actually dealing the cards the casino in question wants you to use, and practice it (personally I think all poker dealers should pitch but some casinos, particularly American ones, don't seem to care). Learn to spread a flop properly (protip: if you're just turning three cards over one at a time, you're doing it wrong).
And remember that being a
poker dealer isn't all about cards either, you need chip skills and math skills as well. Chip work isn't as intense in poker as it is in most other casino games, but you should still be able to pick a stack of 20 chips just by feel, break down a stack to count it quickly and accurately, and you need to be able to do this all one-handed, because you should NEVER be putting the deck stub down during a hand.
Get HEAPS of practice working out side pots because they're one of the easiest things to screw up when you're under pressure. Deal nine
hands to nine random stacks of chips, pretend every single one of them is all in, then work out the side pots. It'll almost never happen in reality, but if you can deal with that, you should be able to deal with anything.
I can't imagine many casinos will actually care that you've got experience dealing in home games but if you've got a few of the basic skills under your belt it might at least make the actual training process easier for you.