A 10kg/22lb kettlebell can be too heavy or too light for beginners. It depends on what the kettlebell will be used for. There are ballistic exercises like the kettlebell clean, kettlebell swing, and kettlebell snatch, and they need more weight to be able to provide resistance for the powerful fast movement that is intended to be made for these exercises. In most cases, this kettlebell weight is actually too light. A kettlebell can be held with two hands for squats and it would be way too light for building strength in most people, but it can be too heavy for a one-arm strict shoulder press. So, in short, there is not one answer that fits all, you need to figure out what you're going to be doing with the kettlebell, what exercises, and what goals you want to work toward, and base your kettlebell weight on that. In general, this weight is too light for strength but can be ok for cardio.