I would urge you to consider doing the job IF: you have a light at the ceiling spot where the fan is intended to go. This question is asked because if a light is there, you have the wire there, you have the box there and in most cases, these supports will hold a ceiling fan.
Now, if you have a two way light switch for that light, you might also re consider the job. But if you have one switch then procede on.
Turn off the light or better still, turn off the power at the fuse box or breaker box, but first before the lights go off, assemble the fan according to directions.
Now turn off the lights and run a trouble light to the area so you can see.
Remove the light fixture and stretch the three wires out and disconnect them from the light fixture.
Now, according to directions, install the cradle that actually holds the fan to the junction box. Now, hang the fan according to the directions, normally this is without the blades, this way you don't have to mess with them.
Physically inspect the stability of the junction box and make sure its secure.
From this point on, follow the instructions from the product, be sure to connect the white fan to the white house, the green fan to the bare wire house, and the black and blue fan to the black house.
Install wire nuts and tighten them tight.
Should not be that big of a deal. Come back if you have problems.