That atomizer you posted is not a dripping atty, its a tank atty so thats not what you want.
Personally I would just use the attys that come with your kit for testing juices for now. You could always get another one later.
Some people like dual coil cartos on lower voltages, but personally I find dual coils only really shine in the 4-5V range.
I would try the Smoktech 1.7ohm XL cartos. They are awesome and will work great on your PV. They are designed for 3.7V PVs and give a great vape. They are single coil, but produce vapor similar to a dual coil, plus wont drain your battery like a dual coil. I use an E-Power which is similar to a kGo and the Smoktech 1.7ohm XL cartos are the only carto I use.
I get mine from Crystal Clear
vaping bc they have free shipping which is nice when you just want to order some cartos. CCV calls them the "Ressurectors" but they are the Smoktech 1.7ohm XL cartos. I also like CCV bc they give a free syringe and if you get a 15-pack, you get a free syringe and a free drip tip.
With either those or dualcoils, I recommend using a syringe to fill them. They hold alot of
juice and need to be filled correctly. Using a syringe takes all the guesswork out of filling and ensures they are filled properly.