Or become obsessed and spend too much!
Yeah, there's that.
Can I make a controversial recommendation that I wish someone had made to me when I first started this? Most of my expense has been in hardware, the vaporizers and atomizers/cartomizers, while I tried to find the thing that matched my ever-changing tastebuds and body. What worked for me right after I started vaping didn't very soon after. What I got next has been fine for the three weeks it took me to adapt completely, but now it doesn't. I want easy and convenient. I want lots of vapor. I want good flavor. I want to be have something that will give me a good kick in the morning, for my wake-up, and something that will dial it back a little through the day, then let me use my "dessert" vapes after dinner. The only way I get all this from a single setup is by going with what most people consider a "mod" - something built by a small group of people in small lots and that typically costs more than a standard kit.
The amount of vapor and flavor you get is a function of the voltage you feed to the atomizer/cartomizer, and the resistance of the heating element in that atty/carto. Higher resistance needs more power. Lower resistance needs less. More vapor and flavor needs more power - up to a point. Past that point, you're burning the juice instead of vaporizing it, and it tastes nasty. If you read through here, you'll see posts where people gripe about their "best" or "favorite" atty burning out. That's because even the same manufacturer has small variance in the product, and your experience will change even between two atomizers from the same manufacturer in the same package.
For all these reasons, I wish the first PV I'd bought had been a variable voltage mod. I can bump up the power in the morning, or when I'm using a higher resistance element. I can lower it in the afternoon and evening, when I'm using juice that needs less (or when I need less). They range in price from $100 to over $200, but they're all the PV you'll need, because they change to suit you and your other hardware, no matter what it is.
Vaping is not like smoking in a few ways, and your body has to get used to it. When I first started it seemed harsh, and I coughed a lot. As I got used to it, the same PV didn't give me enough, and it felt like I was sucking in air. So I got new hardware - higher power. That worked until a few days ago, when I adapted more. Since then I've been on a quest for throat hit, because once again it feels like I'm sucking air. I've bought several kinds of atomizers and cartomizers, and some of them are fine, some don't give me anything. With a VV mod, I adjust the power to the needs of whatever I'm using - one size fits all. If this had been the first thing I'd bought, instead of the last, it would have saved me a chunk of money.