Try YMCA at Jordan. My son started with 親子班when he's 3 because he always spent his holidays (Easter & Mid-autumn) in hospital with pneumonia. Coaches there are very good and patient. Now he is 6 and can do both freestyle & backstroke for 100M and 50M for breast stroke. On top of his much improved health, I just found the certificates awarded are so useful when applying for Primary one this year.