......and this room is on a terrace i mean a rooftop

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hey so to remind you again am here situated in India so perhaps i cannot really get hold of a lot of supplies and i plan to work with everyday house hold material and normal stuff you can get from most markets
there are two problems we need to tackle:
1.there shouldn't be too much of sound reflections in side the room (that is fairly easy to handle)
2.a lot of sound/music/noise should not escape out to the floor below or through the two wooden doors
we practiced there once and the neighbors were out complaining about our volumes, and the largest amp we have is a 60W and there are only three amps+acoustic drums, its a classic rock/blues rock outfit
so could you guys suggest some ways to go about sort of sound proofing the room in a somewhat in-expensive manner especially about the sound leaking from the doors and to the lower floors (drums especially)
btw sorry for the long post