I would suggest trying to get the hang of the UFS with cartomizers to start. The filler in them helps you get a feel for the learning curve of feeding vs air flow. That being said, when I set mine up, here is the process:
1. Lube o-rings on the CT and the bottom of the tank
2. Insert the tank into the CT
3. Screw the tank down just about all the way
4. Pull out the connector pin 1/2 way or so
5. Thread in the atomizer nice and tight
6. Unscrew the tank, so you close off the liquid control
7. Place your tank pieces on accordingly
8. Lube the O-Ring for the top cap
9. Screw on top cap
10. Place O-ring around atomizer
11. Screw on either the mouth piece or the v2 tank top
From there, be careful how much liquid to air you are mixing until you get a feel for the liquid flow for the particular liquid you are using.
Hope that helps, kuya!