I Dunno my advice is gonna be a little different. speaking from my own personal experience, the ego batteries, that were available with when I made the switch, did not do me any good other than push me into more cigarettes. it wasn't until I got an MVP and an aero tank that I could quit, but I was smoking 2packs a day.
Everyone is different and vaping is in a wonderful place right now for you guys and gals starting, there is bound to be something that'll work. what it is, will be a process of trial and error.
Being the frugal person I am, I try and think long term, something like aforementioned istick50 or an innokin cool fire 4 will be great paired with a nautilus mini, I say that because both will work great should you feel the need change to a different type of tank requiring more power without needing the investment of another mod/battery right away
Both of those boxes have a built in battery and charger.
The only thing would be that their is a slight learning curve to the devices, but in my experience it was worth it; and, you have this cool forum with people here eager to help you along your journey.
Best of luck to you both and congrats on making the choice of a healthier lifestyle