I have placed an order for a Smok Alien Kit and 2 batteries.
Will you be charging the batteries in the mod? I read a Reddit post on Alien charging and it wasn't very complimentary about Smok's system. Iirc Mooch was also skeptical about charging in the mod, and horrified that the Alien uses "floating charging", whatever that is. I'm not sure if the Smok has bypass charging but, if not, will you simply not vape while the batteries are charging?
I'm a big fan of getting two setups to start with, along with an external charger. It means you have a backup if one setup fails, and also that you can vape one setup while charging the other. If buying a second setup is too much, I'd at least get a second set of batteries so that you can vape one set while charging the other.
Buying two setups does cut your budget per setup in half. But having a really fancy mod and tank is no good if the mod's 510 or circuit board packs up, or you break a post or the PEEK insulator in the tank, or you drop your setup in the bath or have it stolen at a party, etc. That's the shortest and surest way to get back on the cigarettes. Even if it meant buying two Picos and two clone drippers, I'd rather have two rigs from the get-go.
That said, I don't think you'll go wrong with the Alien. Enjoy and welcome to the start of a long and wondrous journey!