Well, it looks like you've got 2.5ohm Bauways, so they're not running too hot. There are many ways to fill a carto. Many don't like the condom method, but I actually preferred it - but my method varied a bit, from what's on the videos. The cartos I use now, when I'm not bottom-feeding, don't like that method. Whatever method you use, the point is to get the filler wet, so that the coils (the things that burn) are wet. If they're dry, and they touch dry filler around them, they'll burn it. And you'll get that nasty taste.
Having said that, this isn't rocket science. Heck, I often tend to start vaping a carto within a minute of filling it. So, you definitely don't have to wait overnight. Just be sure they're wet inside, and you can err on the side of excess liquid, for now. As many have mentioned, you can always blow the excess out. And do yourself a favor and order some more cartos & juice. Try juice samples, until you find what you like. Just don't get to the point when you run out, and have an "excuse" for going back to smoking. In time, you'll probably prefer the e-cig experience over smoking, regardless of the health benefits, 10 times out of 10.
It may seem a bit frustrating now, but it will get better really fast. And soon, you'll be helping out newbies and converting smokers, yourself.