Dyslexia's no fun, my Daughters Fiance has it and he suffered at School because he was also aggressive and impatient, the Teachers had him down as a hopeless case which shouldn't really happen these days; because of his wasted years my Daughter had to teach him to read and write and we have spent the last 2 years boosting his confidence and making him believe in himself, now he is doing well at college all his aggression has gone and he is a much happier person.
I don't know if this will help WernHalen but could you record your sessions, then if you miss a bit out you have a record of where you were and where you went wrong and will allow you to record sections of the piece and move onto the next part, so you are cutting a session into bitesize pieces rather than trying to do the whole thing in one go, I hope I'm making sense and that it might give you an idea.
Good to see you around again
Best Wishes
Chris
You don't stop laughing when you grow old; you grow old when you stop laughing.