Try this local school if you can't find any. This school provides both Putunghau and English course from upper class (1/2+ 1/2). Teachers are mainly from UK or Canada for English class and Taiwan or Mainland for Chinese class. The school is very small but easier to get in. Also no debenture needed only one-month deposit.
No matter what, put your child's name on the waiting list first (as much as you can). My son waits for 2 years before he goes to this "famous" international school.
Forget about ESF, they usually ask you to come to interview at last min. besides that, they need to know your HK address to make sure which school you should apply to.
If you are going to stay in Kowloon side, try KENSINGTON Kindergarten" in Kowloon Tong. Or Anfield kindergarten. These 2 seems OK.
Studying in Hong Kong is really crazy. Local people plan their Child's kindergarten at 1.5 years old. Many many useless and expensive play group around to satisfied parents. Good Luck!!