on the imperial fleet, there is a area called "Combat Area" There you can buy PVP gear, Champions and Centurion, as the guy said, the best you can do is save 1k Merc commendations and 1k Wz commendations, then buy 5 bags, counting the one unique you have on you, you have 6, open them, decide what you want to buy, buy it, go get weeklys, and dailys, and start doing them
Also, keep some orange gear, buy some mods for it, and you have a decent starting gear set.
What server are you on? might be able to help you, if u are on mine