I would go for a simple and inexpensive setup, ego battery and a disposable atty.
It's simple. You don't need the frustration of having problems with or forgetting some instructions. Press the button and suck.
You want 2 batteries. There is nothing worse than needing some nic and finding a dead battery. Or breaking your only one.
If by some chance, this is NOT going to happen for you, you give up vaping it is better to have a $50 paperweight than $200 worth of batteries, chargers, mods, etc. Get through the first couple of months without smoking and then decide. Some people are happy stopping smoking, lower nic, and then stop vaping. Some continue with a simple ego setup. Some get into the vaping hobby and spend thousands on gear. (You can spend thousands on any hobby.)
Again, if you keep it simple it will always be there to help you quit smoking.
Good luck.