Good for you - for getting in to training and keeping with it to the point your teacher is pleased with your progress! Just a note...in general...most instructors have a good sense of when one of their students is ready, even if we the students don't feel quite "there."
Hi Kevin, you may be interested to know that in July 1997 I fractured my neck in a road traffic accident leading to three months coma, a head injury and a fused neck vertebrae c3-c8. I also now suffer from schizophrenia and so can relate to your mental health issues. My injuries have also left me with noisy breathing.
Not to be beaten however i have dabbled with martial arts over the years, and after about 40 hours mat time my local sensei told me that he thought that i am about ready for my first grading (yellow belt). Well not to be rushed, I have suggested to him that we delay it by a bit so that i can learn more of the syllabus. I don't know if you feel this way but there sure are a lot of throws and holds to learn. But be this as it may, i can generally do the techniques when shown how, and so in consequence I am considering asking him about this grading again when i see him this week, to see if he is still happy for me to take it.
Please note in our dojo there is no randori and it is just waza. I think that this is the traditional rote.