Go with whatever you are most comfortable with concerning battery size. Most people here who are successful non-smokers started out with "cigalikes". That's what I used to quit.
However, it only took me about 3 weeks to decide I needed something bigger in order to stay off of the smokes. I grew very frustrated with the number of batteries I had to carry with me to last out the day, and then it took all evening to charge them up again. There's a better way if you can somehow get over that idea that your battery has to be the size of a cigarette.
Just trying to save you the money you will spend on a kit you may only use for a 4 - 5 weeks. That money could have gone to more juice flavors to try or different juice attachments to try. An ego battery setup right from the start is not that much bigger than a cigalike but will give you far more battery time and more options in choosing a better juice attachment.
Advancing up the vaping ladder with ego's and mods
Good Starters Setup with an Ego