Thanks to both of you! Since I dont play the game before ARR, I guess I can be more relax about my current retainers..

One lingering question is the additional retainer service at mogstation:
It is written as the following:

Retainers Service Fees
Number of Additional Retainers Fee
1 No Additional
2 No Additional
Per Additional 1.40 EUR/ 30days

Does the first two retainers = in game retainers that we obtain, or does it mean that we can hire 2 extra retainers without any additional fee?

Square Enix wording is so hard to digest some times.