The casino host is the person you should have talked to. The casino host's job is to interface between the passengers and the casino. If you ask the host how to play a game or a slot machine or video poker, unless they are busy running a Blackjack or Slot Tournament that should be able to help you out.
Maurine - Playing the slots won't take too much training, just insert your card, set up a pin number, decide how much you want to spend per pull and .......push the button or pull the handle(Either way the result is the same!!) And smile and laugh....you'll have some inexpensive fun (Yes, there are penny slots too!)
And you'll probably win. My ex-boss bought 2 rolls of nickels in Las Vegas while waiting for her husband to finish on his machine. She sat down and won $14,000 on a nickel slot machine. She didn't know what she had won, her husband had to tell her.
Maurine - Most slot machines have the capability of using your ship card (and dinging your shipboard account) as well as taking in US Bills!!! Normally, when using your shipcard you set in the amount you wish to use as a"gambling bank" (ex.: $10, $12.25 or whatever) and then proceed to spend it down or up as you play. The slots electronically are adjusting your balance as you gamble and posting a "running" balance for you.
Just be sure to "log out" when you leave the slot!! In most cases it will print out a balance for you to cash out with the cashier. The slots do not automatically transfer your winning (or losing ) balance back into your ship's account!!
Best of Luck, I have in the past won enough to pay for another cruise!!