Which Fire Emblem game should I play first?

[boypita]

Hi everyone :)

I´ve never played a Fire emblem game and I don´t know where to begin :S It has to be a GBA,DS or 3DS game. I really want to buy one of the Fates game but I´m not sure if I´m going to understand the story :S 

If you have to compare them with Shining Force saga what would be an important thing in favour of Fire Emblem?

Thanks in advance :)