Although I should say, replacing an O2 is about as easy as it gets-- you literally unplug it from the harness, unscrew the old one, screw in the new one, replug, done. Now, you do need an O2-sensor ...
On this model, the sensor in question is located on the crankcase (not the cylinder head as many are). You’ll find it on the driver’s side of the crankcase, below the intake manifold. Replacing it ...