I did my first oil change this spring which wasn't a big issue. No shielding underneath needs removing and the filter in the engine bay is the easiest possible setup. In Canada, the manual says 4.2 liters which is about what I put in to bring it to the full mark. And yes, my car was a good 1/2 inch above the full level from the factory. Subaru is taking no chances here... LOL
As for jacking the front end, you'd be much better off with a set of ramps.