Once your pole hold is solid, you can start working on negative pole-ups (AKA the lowering phase). From standing, go into a pole hold and bend your knees. Then, slowly and with control, allow your elbows to straighten and your body to lower. When your knees come to the ground, stand up and start over.
Once your negative pole-ups are solid, you can also start working on the positives (AKA the lifting phase). From kneeling in front of your pole, reach up just high enough that you still have a slight bend in the elbows and grab the pole with a baseball grip. Then, slowly and with control, start pulling yourself up. At the same time, you will be pushing into the floor with the tops of your feet. That will partially support your weight. (If you have hard flooring, you will probably want to fold a towel and place it under your feet. Otherwise this move is a little uncomfortable.) As you become proficient at this move, you will need to push less and less with your feet.
Once you don't really need your feet anymore, you're ready to start working on full pole-ups and/or the scissor climb Sassylina mentioned.
Good luck! =)