It is easy for children to get very stressed out at the prospect of learning how to swim. It is a brand-new experience for many of them, and the prospect of swimming lessons is not something to take lightly. If you want to take the stress out of swimming lessons for your children, you should work with them early to learn how to swim.
Take age-appropriate steps to get them used to the water. You might start by getting them into a kiddie pool and getting used to the sensation of being around water. As time passes, you can introduce them to slightly more challenging swimming parts. It is about slow walking things in a way that helps them cope with the practice of swimming. Try to remain calm and sensible about their progress.
Keep in mind that you can start them off with swimming lessons from true professionals who know how to introduce your children to swimming safely and calmly. It is all about when you are doing what you can to help your child adapt to learning how to swim. If you approach it in this way, then your child will very likely feel a lot better about learning how to swim to begin with.