There are a few secrets to great Kettlebell Workouts.
It is important to use the heaviest weight that you can handle while still performing all of the moves with excellent form. If you find your form slipping then you need to either go down in weight or do fewer reps. At the end of an individual exercise your muscles should be tired and near the point of losing form. In the years I have used the kettlebell I have only increased weight twice, from 15 to 25 to 35 pounds.
I recommend an adjustable Kettlebell. There are many online options. Using an adjustable Kettlebell will save space and prevent you from feeling ashamed if your strength backslides or are injured and you need to adjust weight down. That being said, if you are doing the moves correctly you should never ever be injured or reinjured with a Kettlebell.
It’s ok to run through the exercises once (takes less than 5 minutes) and then come back and do another set of exercises later in the day. Certainly when you are taking care of children or living a busy life then it can be much easier to do a workout by piecemeal rather than all at once. It’s better to do the exercises occasionally rather than not at all.