I think that ANY sort of exercise is a good start, and having a "plan" or routine is even better! To be honest- I don't know much about kettle bells other than I know some people love them and some people say they cause injury because too many people dont know how to use them- so make sure you KNOW what you are doing there...
But other thank that I think its a great place to start! Do it for a few weeks and see how you feel- and then after that make sure you change it up a bit (add more weight- do more reps- or change your routine completely)
I agree with nelie about eating being the MOST important for losing weight, but exercise is great for so many other things too-
I dont know if it helps but I have found TONS of youtube videos with workouts all varying in length and difficulty- if you are ever wanting to change things up or bored or dont know what to do I would recommend those.