Like I said I'm a newbie too but I watched alot of the videos showing how to do all this. The cartomizers easily filled, I used the condom method but did not push too quickly. I let it kind of suck into the carto slowly. When I didn't see the liquid pushing thru the top side I pulled it out and added more juice inside the cover (condom) and pressed it down in there again, slowly, when I saw the liquid break thru the top I waited a couple of minutes and pushed it a bit further until it stopped absorbing. This all took a matter of 5 minutes maybe. I have used mine all day and it's vaping like crazy all day. In fact I can only draw on it about 2-3 seconds max or it starts me coughing because of all the vapor. Do you hear it gurgle a bit? It should gurgle a little when you hit the button. Press the button before drawing on it, then let the button up just before you stop. Someone else advised me that way and it worked great.
If you took the cap off and it doesnt look wet , then you don't have enough juice in it. My understanding from watching all the videos is it should look "glossy" sorta like an oily sheen, but NOT pooled.
I bought several juices from Liberty-Flights. Hotel, which is a tobacco that is rather strong for me and tastes more like a cigar flavor. Cola which I do like, tastes like RC Cola and lingers after vaping it has a mile tobacco flavor as well. Kiwi which is very mild, not much taste but has a clean smooth draw with no irritation. Mandarin which I also like crisp and clean, cleanse the palate type of taste, light orange flavor, I could vape all day on this. Dr Peeper I also like and does take like a real DP. Chocolate I LOVE, it's a mild chocolate taste not too much not too sweet, like savoring hot chocolate, also one I can vape all day. So far that's all I've tried but have more coming.
I have only tried dripping with all the above flavors. I used the cartomizer for the Hotel tobacco as well as Cola.