Hello,
There is a soaring site in Tuen Mun but it is for south-easterly and the season has already passed. We usually fly in Fei Ngo Shan (飛鵝山) in the summer time for the south and south-westerly.
Simulator is a good starting point but RC glider is not that difficult to fly, especially you have an indestructable EPP wing! Go to Fei Ngo Shan when the wind is SW and Clear Water Bay when the wind is E or NE in autumn and winter.
Find Sam-Goh (三哥) to have a free flight lesson. He is the flying instructor of HKRCSS and he is more than happy to help beginners!
Good Luck!
The Hong Kong Radio Control Soaring Society (HKRCSS):
http://www.hkrcss.org/https://www.facebook.com/groups/HKRCSS/