There are many ways to get extra potency from level 1 and level up until you fell like playing. But, if you follow my suggestions I think you will have a lot of potency in just a few days.

1. When you start Zero Online, open your cabin and select the "Hudson Navigator" item. This will take you to Trainer Hudson and he will tell you what to do next. When you reach level 20 you will no longer have tutorial missions and the first thing you should do is to get a high potency mentor.

The best way to find a very high potency mentor is if you scan them you can see how much potency they have. Players which have potency between 1800 and 3000 potency are the best mentors you can find. They can give at least 200 potency bonus, which gives you 400% experience bonus.

2. The second thing is about the items monsters drop when they are killed. Pick up gold and items from the monsters. If you find unidentified items you can identify them from "Item Identifier" in Steel Warship.

If these items are elite or unique you can equip them and they will give you potency bonus. If you find items with "+" singes in their name and if they are you're kind of a weapon, armor, booster etc, they also give you potency bonus and you could super-add your gears with them.

They give you bonus (depends on what item you got). For weapon - damage bonus, for armor - defense bonus, for booster - dodge bonus etc. You can super-add your gears to a max of 12. This will give you 36 potency bonus for each gear plus the gear quality.