If you want to get into kettlebells then a good place to start is by following the kettlebell minimum programme. It's 20 swings followed by a minute of cardio, jogging, skipping, whatever for 12 minutes twice a week and 5 minutes of Turkish get ups twice a week. once you can do 20 swings comfortably, go to 30, then 40 and then 50. You'll be surprised how quickly you progress, then you can move onto other programmes.