Hey there,
Thanks for reaching out. I'm not exactly an expert on this topic, but I'll do my best to help based on my own experience and what I've heard from others.
In terms of the length of the assessment, I think it can vary depending on the specific university and their resources. However, from what I've heard, the waiting list can still be quite long, especially if there is a high demand for assessments. It's definitely worth asking your therapist about this and seeing if they have any more specific information for you.
As for what to do to prepare, I think it's great that you're already thinking about this. One thing that helped me was doing some research on what the assessment process is like, so I had a general idea of what to expect. You could also try writing down any specific questions you have for your therapist about the assessment, so you don't forget anything during the appointment.
Overall, just try to take things one step at a time and remember that it's okay to feel overwhelmed or unsure. Your therapist is there to support you and guide you through the process.
Hope this helps, and best of luck with everything!