I've been vaping for about a month now. I may not know everything, but I don't think I need to with what I already know. I've been playing with electronics since I was a little kid and chemistry has been a reading subject of mine for years. Many of my hobbies involve working with electronics (hardware AND software) or handling hazardous chemicals. Basically, I just have a lot of experience as a geek. All of the stuff on batteries and atomizer design is not particularly new to me. I had a good idea of how e-cigs as a whole worked before I even got into using them myself. I'm pretty mechanically inclined, so it's generally easy for me to figure out how things work and quickly make good use of them. I can look at an e-cig part I'm not familiar with and probably still tell you what it does and how it does it. I can take it apart in my head. Things like calculating wattage/battery strain, re-wicking, re-builds, and cleaning were things I basically already knew how to do. It was a simple matter of taking the relevant knowledge and applying it to e-cigs. With the proper tools, I'm confident that I could build my own.
I also like to read a lot, so I've just been soaking it all up lately. Experience-wise, I'm a beginner with lots of mistakes to make. But in terms of my knowledge and skills, I'd say I'm closer to intermediate or advanced. I do excessive amounts of reading on the subjects that interest me and the learning curve for this one is rather shallow because of what I already know. It's all very easy for me to grasp. A lot of it is more like a review from an e-cig-based standpoint. I'm just taking what I know and applying it to what I don't. Even the more advanced mods are very simple devices when it comes down to it. It's not rocket science - only vapor science. If you can just nail the basic idea, you can figure it out. The details aren't so important and really just come down to a mix of trial and error with personal preference. That's what makes figuring out what to buy seem complicated. It's really not, though.
It's hard to say there's such a thing as mastery in the vape world. New products are constantly being developed and the existing technology is still growing. Take a vaper from a few years ago and surround them with vapers from today and they will feel like a noob. I don't exactly consider it a skill either. To me, being a good vaper is like being really good at eating a cheeseburger or something. Sure, there are connoisseurs who can totally school you with the burger knowledge they will drop, but you don't need all of that to eat and thoroughly enjoy burgers all of the time. They may know more about burgers than you, but they're no better at enjoying a burger than you. When it comes down to it, cheeseburgers are something we all can appreciate! That's the beauty of it.
With that in mind, my setup is quite basic. My Volt spinner and T3 serve me quite well. I actually like that it's so simple. I don't feel the need for more at this point. The next upgrade will be significantly more advanced and then I'll be done assembling parts for a good long time.
I'm already mixing my own juices, which is uncommon for someone as new as me from what I've gathered. Mixing juices is really easy, though. You just have to make sure not to expose yourself to the nicotine base. I'm also using the weaker 48mg base to minimize damage from accidental exposure. That calculator spreadsheet in the DIY section really simplifies the whole process. It does the hardest part for you. DIY juicing was made out to be some high-level thing that you should only attempt if you know what you're doing (and that second part is true) but it's actually this really simple process made out to be exceedingly more complex by the fact that you can go about mixing in any number of ways, everybody has their own philosophy, and there are so many different flavor varieties that come in different forms. But at the end of the day, juicing is just juicing.
What I'm wondering is when VV will become the standard. A lot of sellers market VV devices as advanced items when really I think everyone should start with a VV battery. I'm pretty sure I am far from the only person out there who went straight to VV and thought it was a really simple thing that no e-cig is complete without. It just seems like more of a basic feature to me.
But see, it's things like that which really highlight the silliness of this perception we all have of this whole "difficulty level" thing. The difficulty factor for 90% of all things vaping is far less than that of figuring out how to drive and operate a car, which most people learn to do before they're taking care of themselves. You're not mastering a skill, you are cultivating an interest.
...unless we're gonna start having contests, which could actually be pretty neat if we can find a good way to accurately and consistently make precise measurements of vapor content. It would be totally ridiculous, but a lot of fun.