Hi
my wife and I are relative beginners at this, only just been to an HU meeting, just joined HU website, so maybe our perspective as purely road riders in Europe so far will be of use.
First off, good for you, go for it. Second, you've posed your question to a community who are naturally adventurous and independent and probably would prefer not to use 'organised' tours.
Jenny and I have toured together and camped without a tour company but also done a couple of organised tours and we ride with an active bikers club. We're off on Friday to Austria with an organised tour.
My perspective would be what have you got to lose by using a tour company first time round? You'll get a bit of reassurance that you're not on your own, usually great company (we've booked this next tour specifically to meet up with friends we made on the last tour!) and most tour companies, if you ask them, will give you a very accurate idea of the intensity/mileage etc of their tour; after all, its entirely in their interests to have happy tourers and ones that can do that tour and not find it too much for them.
If you do decide to cut your teeth on one of those in Morrocco it doesn't stop you going back on your own another time so if you can afford it, you can get the best of both worlds.
Just a thought or two.
Good luck, have fun (Morrocco is on me and Jenny's list together with Turkey as are possible first modest 'adventure' tour - looks great!)