I play the flute right now, and have really been interested in the oboe for awhile. Is it difficult to catch on to?
I know the tone quality has to be difficult to master, but would it be hard to switch over?
I learned saxophone this past year for my schools jazz band and didn't find much difficulty with it.

Oboe shouldn't be difficult to switch over to. If you are an anxious individual who wants immediate gratification then you may not enjoy playing oboe. If you are more introspective and like being methodical then oboe should be a breeze. I had no issues with fingerings going from Sax to Oboe.

But if you want to be really good you'll need and you'll want to get into learnign how to do your own reeds. And that is a black art in and of itself.

Yes it is (or was) difficult. I may the switch a couple of years ago, and when told my flute teacher that I was planning to play the oboe, he laught and said the "You are always on to the most difficult things", and I admitt now, the first two years was heavy.