I started with a 510 and pretty quickly moved up to Riva batteries, CE-2's, and now variable voltage, and I find that bigger batteries and mods do make for a better experience. But I absolutely agree with the OP. The really important thing is to get a PV that you're comfortable with and get started. I've been vaping 6 months, and I'm now comfortable with trying new technology and modding my cartos and such, but I still remember the intimidation factor in trying an e-cig for the first time. All the different models and juices and carts and cartos and the lingo can be confusing. What was really the crucial thing was that I stuck a pre-loaded tobacco flavored cart in my brand-new 510 for the first time and took a drag and thought, "Wow. This really does taste and feel very much like a cigarette. I think this might be able to replace cigarettes for me." And it did.
I think we more experienced vapers have stopped looking for something to take the place of cigarettes and have started looking for a better vaping experience. That's great for us. But for real newbies, thinking about trying an e-cig for the first time, what they're looking for is something to give them a cigarette-like experience that works well, is easy to use, doesn't make them feel like they're doing something too weird, and doesn't cost a fortune. For a first starter kit, a 510 or Kr-808-D will likely satisfy those needs. Then, when they start to get frustrated with short battery life, or have been hanging around ECF and joined the quest for the perfect vape, they can move up to bigger and better things. Compared to the cost of cigarettes, a Riva battery or two is cheap, and I bought a Riva starter kit about a month into vaping. But by then I had already become comfortable with vaping, more familiar with how I would use my electric hookah-doodle, and more knowledgeable about the available devices and the vendors who sell them. I still have a few 510's, and still use them, so it isn't a wasted purchase.
So my advice would be to get an affordable starter kit from a reputable vendor and start. There will be plenty of time for tweaking later.