Don't try and find an apartment from abroad. It's very easy to screw up and/or get scammed.
Use AirBnB or search for serviced apartments to find a one-month rental, come here, and then spend that month finding an apartment.
Don't ever send money via Western Union or any other money transfer service. This is a very common scam. AirBnB should be OK, but for the serviced apartments, pay them after you arrive in person.