1) As of right now, the 'free' BOs you get are lacking in racial skills. Posted about issue, but not known if the devs know about it.
2) If you want a race/gender combination of your choosing, you'll have to buy them manually and then retrain said officer for the skills. Total creation of your BOs aren't in the game for some crazy reason, and this is the only way you can get them.
3) Once you do get the race/gender you want for your BO, you can hit the Tailor and design their uniform and exactly how they look.
Yes, this is extremely backwards in a game that offers full customization with everything else (like in CO, as this is the exact same engine running both).