First of all, congrats!
You can check them with any APV that has a resistance checking function or you can use an electrician's multimeter if you have one. The reason you check them I believe (and this is especially essential if you've rebuilt the head) is that if the resistance is too low it will get very hot and you can damage your device. Otherwise, if you just wanna know what combo of voltage to resistance gives you the heat and flavor you like, well, then you just need to nerd out a bit! But it's just fine for us beginners with our twist batteries to start with a low voltage and just slowly turn it up til it's just right.
I'm a noob, so if I oversimplified, left something out, or just plain said something wrong, I'm sure someone will be along shortly to set us straight!
Thanks for clearing that up! You convinced me that I definitely want to stick with simple for now. You almost have to make vaping a vocation if you want to learn everything there is to know, lol.