Welcome to ECF!
I hope you also got:
batteries and chargers for the vamo and kts.
Something to put on top, to hold the
juice. I like Kanger bottom coil units, other like Vivi Nova and CE5 top coil units. Some (myself included) also like carto tanks, or dripping. Imo, a clearo (Kanger evod, T3 or Protank, Vivi Nova, CE5) is an easy to use intro.
juice. Best bet there, if possible, is to go to a local B&M that has a "juice bar" where you can sample different flavors. So you can find out what types you like, and then go online from there.
Nic level? That will depend on how much you smoked. 18 mg/l (1.8%) is often a reasonable start, but we're all different. That could be too much or not enough, only you can tell.