It is up to you to decide what you want to do.
I personally do Weight Watchers (WW) at home with no meetings and have done well with it (though I do deviate a bit during holidays and summertime going over daily and weekly points and tracking a bit less.) You could even do a modified low carb version of WW if you'd like but they do have GHG
(good health guidelines) that they'd like us to follow. Are you talking about joining the online or meetings if you decide to do WW? You get an alloted daily point target (with your stats, I believe it to be 44 daily, 14 extra if you are nursing full-time, 7 if you are part-time to your daily points target) along with 49 weekly points. You'd have to punch in stats of the food itself to calculate the points but it's easier after the first month or so since you can savce meals, fave food and just generally remember points of most foods. Is that something you're willing to do? There are many (free) online calculators, android/iphone WW apps and etc. PS a tip, not everyone loses consistently with eating all the weekly points, I personally do better with 1/2 to 1/3 of the weekly points so you will have to play with it to see what works for you. Everyone flutucates but it will come off eventually!
I do not know much about Atkins. You don't have to be the best dieter, just keep track of whatever you are eating and if you are gaining consistently then tweak it from there, eliminate or adjust some stuff and see if you lose, whether it be WW or Atkins, etc.
I wish you the best of luck with your decision(s.)