I'm not a cloud chaser so I can't really say where to start. I mean, for one, you have to decide on a mod, and I'd recommend a two battery mod if you want to use low resistance coils (coils for cloud chasing) and there are so many good options out there. Smok has been inconsistent in the past I am seeing less complaints, and when Smok works and does what it does best (high wattage vaping, with cloud production and decent flavor, without temp control) Smok can actually be a good place to start, for some. If you do get a Smok mod I would probably go with a vendor that has a reasonable warranty period in case it's needed so you have some peace of mind. I don't consider Smok as durable as some other brands, although if treated well, they can perform well. Coil quality on Smok tanks can be somewhat inconsistent, and that can become a chore.
I'd check out the VV/VW section of the board, or even TC (unless you think you'll never want to use temperature control) but there are some good mods out there that do TC well.
If you'd like a tank that would ALLOW you to use TC as a cloud chaser, well, the Crown Uwell tank I believe has some stainless steel, TC capable coils and users rate it pretty highly for coil consistency, overall function as a tank, good flavor, and the coils last a long time. That might be a possible tank for you (either the original or the 3, the Crown 2 is not so well regarded.)
Keep in mind you don't have to limit yourself to a kit, you can buy a mod or a tank separately.
Based on feedback here at ECF, I would buy a Crown setup over a Smok tank probably, if I were a cloud chaser, which I'm not.
I'm not saying don't go with smok either if that looks great to you, I'm just offering up some other possible options. You could also look at the subforum for reviews of mods and gear and see if any of them interest you, etc.
Best of luck, the array of choices can seem dizzying at first but the main thing is, get your first setup. It may or may not be a "total win" for you, but I didn't land on my best vapes by magically searching them out, I had to do a bit of experimentation and failure, first. It's just how it goes sometimes.... because you will probably learn some of your vaping "preferences" by vaping, as well as build your skills, it's just kind of how it works..
If you make the jump to vaping, you'll need a backup setup anyway, so if what you get is not 100% what you want, it can still help you transition to vaping only as you learn more, although it's good you are doing your due diligence and etc.
Anna