more details please...
Does the sound go away?
Are you referring to just the fan circulating air, or the air actually being cold.
I'd bet the sound is the A/C coolant being pumped through the system. This is normal. When the system is off for a while, the coolant will condense and settle. The noise is the bubbles generated as the system is primed.
I have the automatic climate control system, so I don't know how the basic one works....but the fan takes time to spool up. As for taking time to blow cool air, this is normal. The system has to cool itself off first...