You don't have to order all of that stuff right now if you don't want, you could just get the kit and four 18350 batteries and see how they work for you. You may find you don't want the bulk the extra length gives you, as I did.
I also don't see any gain ordering batteries and charger elsewhere, with the 10% off and free shipping, I can't see how you can gain anything.
As for juice recommendations, it's just too hard to say what you will like, taste is too subjective! I'll try a juice and taste this and that, "Tude will try it and taste something totally different and another person will taste something different than either one of us! The best thing I can tell you is to find a local vape shop that has a tasting area and try them all and find some you like. Then buy some of them, but not a lot! As you are just starting your taste buds will clean out and what you like this week, you may not next week. It's really in the first month or two you will notice a drastic change in your taste, then you can go back to the vape shop and start all over again. Once you get settled on something then you can search the forum for something close to that from one of the vendors here, or try the sample bottles as others have suggested. Yes, it sounds complicated, and it can be at first, but it's like oatmeal and raisin cookies vs. chocolate chip cookies, some people like one or the the other, some people like them both, but you don't know until you try them!