Learning to swim is a very beneficial skill, which can help you improve your physical fitness, enhance your heart and lung function, and let you exercise freely and happily in the water. If you really want to learn swimming, but think that one-on-one courses are more expensive, you can consider the following ways:

1. Choose a cheaper swimming course or swimming training class. Some swimming pools or sports centers may offer swimming courses for many people to study together, and the price is relatively low. You can go to the local swimming pool or sports center for more information.

2. Find the right coach or mentor. Some professional swimming coaches may provide one-on-one swimming teaching services, but the price of some coaches may be higher. You can find a suitable coach or tutor through friend introduction and online search, and negotiate the price with him.

3. Choose self-study. If you have a certain understanding and foundation of swimming, you can also improve your swimming skills through self-study. You can find many swimming teaching videos, swimming practice methods and other resources on the Internet, which can help you learn to swim by yourself better.

In a word, learning to swim is a very beneficial skill. If you have time and energy, you can consider learning to swim in various ways.