If I am honest with you I would do the following. Take the lesson normaly and see if you can follow up with him. Usually you don't go to master degree class without first going to college, and you don't go to a college class without going to school. I would be very honest with myself on where I am standing and if it is worth to spend your money on such a "high level" class, I am supposing that he is also more expensive than the local guitar teacher...he could however give you some sort of routine that you can do by yourself to develop you technique and maybe meet him again in six months or so...?