Hi Timonette, sorry for the delay in replying.
You'll need at least one spare atomiser and perhaps another battery or two. I find it very worthwhile to have extra chargers so you can be charging a couple of
batteries and never get caught short. You can buy all of these from
njoy, or save money and buy them from an independent reseller. As you're in US, try Meltrex, PureSmoker or eSmokeytreats. You can find their details in the suppliers section. If you decide you want to stay loyal to the brand, be aware that you'll have to mail NJoy to buy a spare atomiser as they're not on the site - they go for $25.
Welcome to the forum and to e-smoking!
Emp