Stop. Now. While you still have time. And money.

(J/K...I'm gonna tell you to spend some money...Hahaha.)
I started out with the V2's and like you, found something maybe a little lacking. I think for me it was the reliability, the batteries just didn't last, the cartos just died on me suddenly and overall, the system just wasn't sufficient for me to actually quit smoking. Once I upgraded, though, that actually got me off the cigies. Fear not, though...it's not a total waste...you'll figure out how to use those 808's later on. They're great for trips around town, sampling and ultra-stealth vaping.
I definitely recommend a variable voltage battery...something from a reputable company like Kanger, Joyetech or Smoktech. They're great and let you dial in flavors with voltage changes. The charge lasts me about a day on 1100Mah batteries, so a couple of them is a perfect combination for charging and vaping. Some folks will recommend mods, and they're fine, but it depends on your lifestyle. Not everyone can bring a big old battery or dripping system to work...for me, at least, a mobile setup is great and the eGo style VV's are great for that. You can always get a mod later...but this is a good first step into "real" vaping.
As for tanks, there's a lot of preferences out there, but the Kanger Mini-Pro's are what I've settled on. I like the ability to use any juice out there and they've been really reliable for me. I also have a handful of Kanger eVod's...they're stylish, reliable and relatively inexpensive. Both probably won't hold enough liquid to last all day for most people, but refilling isn't a big deal really. I would probably steer away from Pro-Tanks (and other traditional 510 clearos) until you know why you want them. They hold a ton of liquid, but aren't as portable and fit better on a traditional mod setup. I personally really dig the Kanger setup because I rebuild the coils, so ongoing costs are cheap. If rebuilding not for you, other systems might be more to your liking as their coils will last a bit longer. I think the biggest thing to consider is how many different types of coils/atomizers you have to support...that's why I like the Kanger setup...one coil to rule them all. (At least for eVod, Mini-Pro and Pro-Tanks, anyway.)
I'd second Mount Baker Vapor as a good first start. They have some great juices and they're relatively inexpensive, but their smallest "sampler" is 15ml. It sucks if you don't like a juice, but great if you do. They let you customize your juice precisely how you want, but if you don't know, I'd probably recommend a 50/50 PG/VG mix with zero flavor shots. This will give you a good idea of the flavor and if you want more, you can play with it on a future order. There's tons of recommendations on the forums here. Alice in Vapeland is also really solid, but harder to order from because they're basically only open from midnight Tuesday to 10AM-ish Wednesday. There's a ton of vendors out there, so the sky's the limit. I recommend sampling far and wide until you find things you really like. You might be surprised by what you like, so open your options up to things you might not think you like. I thought I'd like tobacco flavors, but no...it's citrus and fruity flavors that get me going all day. I also had a huge disgust for menthol in cigarettes...but have actually found it to my liking in vapes. Both those things surprised me.
Anyway, that's my 2 cents. Others will have differing opinions and that's fine. I hope you figure things out, but yes, most of us weren't super happy until we got into upgraded equipment. Good luck on your journey and welcome to ECF!