Hi! I live in Chiang Mai in the north of Thailand. Try to visit the islands in the south regularly throughout the year. Last year I started - and after three visits completed - my level 1 SSI with Blue-Immersion Freediving on Koh Tao. Once ran out of air (many years ago) scuba diving on a wreck in the English Channel at 23m. Nice sense of achievement to visit a similar depth for the first time - without need of scuba gear!