Three card poker is a bit more complex than other types of poker. In short, that is because you are playing two games at the same time (which is never easy.) In three card poker, you are playing Pair Plus along with Ante and Play. Each of these games actually has its own rules to learn as well as its own strategies for game play. Each game also has its own payout table. As you can probably tell, these complications can make paying three card poker harder to play.
When you take into consideration this, you also should realize the benefit of playing a few practice rounds. This is hard to do in an actual casino, but you can do so online. A few free practice rounds of three card poker can help you to understand the game play and the rules involved in each of the games. Then, when you get to the next stage of using your own money, you can do so wisely.