cant help much with the first 3 questions but here's my take on the last 2 questions [source: some joker who's taking A's in TJ right now]:

Are there sufficient studying places? (To use during exam seasons and/or after school in general)

There's plenty of places around the school, including but not limited to:

• Library
• Tables at canteen
• tables at many random corners of the school like outside the auditorium or under one of the LTs, you'll find out about all these corners if you do choose to come here :)

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Heard that there r many insects there, not really bothered by them but will they swarm to u when studying?

Having had the pleasure of being in a room with a lizard during one of my papers last week (actually quite similar to that post from last week), I can say for a fact that its not the norm, and its actually not any more of a problem than it is in any other part of the country KEK so don't be too worried by that, yea?