Hi and welcome. First, don't be afraid to order online, your credit card company protects you for online purchases, too. The vendors here on the site though are pretty darn good, else this group would make sure they would be run out on the rail if they took advantage of their customers. However, that just doesn't seem to happen here.
This site is huge, to the extreme, First, I would get to know what kind of e-cig you have (a kr0808 from the sounds of it), learn about that one, the different improvements and varieties of that version that are made if you decide to stick with that one if it's working, and you aren't smoking anymore. There are forums specific for the model of device, all the way to modded e-cigs. If it's not doing the trick at first, explore, ask questions, make adjustments as needed, and don't be afraid to try different models of e-cigs as well.
There are recipe forums, and people who can show/teach you how to mix your own juice to save a pretty penny, as well as the good juice vendors and reviews of their services.
All in all, investigate, ask questions, and be ready to be accepted without question. Congratulations on the rest of your life.