If you've never done a double reed before, good luck. I'm an oboe major in college and let me tell you- You will get tired quickly or get dizzy on a MH reed.
As I said, I'm an oboe major in music school- Think of the upper range fingerings on your clair... the BAGED that you use with your register key are exactly the same. (I didn't forget F- that's totally weird on oboe). when you release the octave key, the same thing comes out 1 octave lower same fingering (surprise, surprise).
The worst of it for you will probably be getting used to working a double reed because it's much harder than it seems.
Best of luck- the world needs more oboists.