Ben ji, super pud.
is there an existing ceiling fan where you want to put the old one? If not, you do have to make sure that the junction box is secured for the weight of fan. If not, you can buy anchors to give you that support for like $15.
Other than that, there is like three or four wires(four if you have a separate switch at the wall to turn the fan on separately from the light). The fan's manual will tell you where to put what color wire.
Assembling the fan blades and stuff takes longer than hanging and wiring.