15-35k..... Why such a huge range?
If you can spend less than 20% of your income on rent. Great.
For IFC, look at Sai Ying Pun, or Sheung Wan. You can find new building apartments for less than 30k with facilities. On a budget about 15-20k gets you a studio in an older building. Keep in mind the walking distance to work as summers (6 months of the year) are 33 degrees C, hot and humid, all day every day. (Feels like Florida in a suit).
Consider living on the "dark side". Kowloon station is easy to get to IFC, one station, all air conditioning along the way. About 25-30k for one bed at The Arch with good facilities but a little dated. Olympic station is a bit cheaper, at Harbour Green you can find 2 bed 450' for about 20k. But you have to walk in the heat a bit to the MTR, 2 stops away from IFC.
Consider if you want to go out and party a lot. Kowloon is a $100+ taxi away whereas Sheung wan you can walk home at any hour. Trains close at 12 something. Each line has a different last train time.
Welcome to Hong Kong.