Yes that cleared it up, thanks. I'm guessing you need a drip tip (which i don't know how to use) to sample e liquids or a lot of cartos? I can't see taking in 10 cartos to sample some juice.
Sort of. There's some designs out there that reign supreme for sampling, but I wouldn't worry about that right now. RDA's/RBA's (rebuildable dripping atomizers/rebuildable atomizers) are a fairly advanced thing and not good for your first real dive into vaping, IMO. Even then, most of the designs still use a wick that gets soaked with juice, so you usually have to switch it out to maintain "pure" flavor of each juice. Again, don't worry about this right now, you'll know if you want to move up. Something easier is a better transition, IMO.
As for my advice, I regularly switch juice on the fly with compatible juices. For example, I might combine a lemon with another fruit or something...but I'd never put a mentholish thing in a baked good, that just wouldn't be good. You can get some interesting combos that way, and usually towards the middle of the tank, you're getting "pure" flavor again. For some flavors, you can clean an atomizer in Everclear or Vodka, but if it's burned (or had a really strong, incompatible juice before), it's usually best to replace the coil. Cartos, however, are not always as good at switching flavors on the same carto because there's a lot of remaining juice that will taint the new flavor, maybe for good, maybe for worse.
I like the Kanger setup, mainly because they're easy to rebuild, which makes changing coils a breeze and something I can do inexpensively. That's another semi-advanced topic, but it's easy to do, really and doesn't cost a lot to try out to see if you like it. I started rebuilding about 6 or 7 days in, so it's not uber-advanced as you might see. Cartos traditionally can't be rebuilt, so you're stuck buying them new all the time.