looking at your other posts, you're either a non-native English speaker or you are just unlucky with the keyboard. I thought I'd mention that before people rate bomb you to ****.
Anyway, your best bet is Amazon or a similar on-line retailer. Currently there is no demo version and no digital sales of the product. Even though it is free to play, you still need a paid copy of the game to log in so pirate bay or other shady sites aren't an option.
Good luck to you, and assuming your wife as well in your FFXIV adventures.
FFXI:Sylph - Perrin 75 Hume THF; Retired (At least from my use any way)
EVE Online:ScraperX; Retired
WAR:IronClaw- Peryn SW;SkullThrone- Grymloc BO; Retired