Yes, I look for 510 supplies and also I like to know what's in my juice and the nic amount and they can't tell me.
I am not familiar with the starter kit that you got. I'm sure it must be a decent kit since it managed to convince you that vaping was worth your time, but also suspect it is overpriced. If you are in the Tulsa or OKC area I strongly suggest you stop by one of the local stores to check out what is available. I'm from the Tulsa area myself and can tell you the folks at VaporKings are extremely helpful and the prices are comparable to any place else you find on the web. And you just can't beat the convenience.
Okay so I have mentioned it like four times already but.... Vapor hut in Moore is my favorite local store!