Like RezN8 is saying, it'll probably make matters worse. You're problem, is with the ceiling/floor joists and studs in the walls.
Now, getting the drums up on 'legs' will reduce that which is moving through the floor; direct transfer will be limited to just the four/six points contacting the floor, but....this will tend to increase the overall resonance of the drums, meaning though less is moving through the floor...more is being projected towards the walls. For the walls, you'll need to increase their mass. They're vibrating sorta like a drumhead. Making them as thick/heavy/dead as possible will reduce the amount of low-end moving through them.
The "best" way to handle this, is a room within a room...literally. Floor, walls, ceiling...a big box. You can use thin furring strips attached sparingly to the existing walls, then attach your new 'inner wall' to the strips. The 1-2" void between the old and new walls/floor/ceiling will reduce low-end transfer.
I've skipped the details, because it's a rather involved, semi-expensive project, but if you're interested, the info is out there.
The Auralex Hoverdeck Drum Isolation Platform may make your drums feel and sound a bit better, but it'll do little to isolate what's leaking into other rooms.
Oh yeah...hi, I'm new.
