The fan itself will be under the stove. There should be a little copper tube coming down the fuel
metering valve, bending under the stove and back up to enter it at the burner. The combustion assist fan, if there is one, will also be under the burner. The appearance of the controls has changed over the years but they will be somewhere accessible and will consist of an on/off rocker or toggle switch near a rotary knob -- maybe a brass one that turns smoothly or maybe a chicken headed one that turns in steps. They can be located in different places according to whatever is convenient for the particular installation
but on a modern stove would be on the lower front of the stove.
Other things to think about
Is your chimney clean?
Is your burner clean?
Are the little holes in the side of the burner pot clean -- they are much more important than you might think.
Do you have all the burner parts
-- the burner ring and superheater are important.
Do you know how long it's been since the stove was used? Have you asked the person you bought it from whether he has trouble with smoke in the cabin?
It might be helpful if you put up some pictures of your stove including pictures taken down into the burner and described the process you go through when lighting