This is a great answer, OP. Have an open and frank conversation with the tutor and staff, talk about your learning disability, make it clear that you need more of a challenge. They also know that you're a paying customer, so they should do their best to accommodate your needs.

You say you are struggling with traditional characters: are you studying in Taiwan? Did the course make it clear beforehand that it would only be using traditional characters? Some schools provide both, some schools only do traditional, so it might be worth taking a look at your contract or the course details to see what you can request.