I didn't get the job, but it seems the interview wasn't as terrible as I thought. The woman I spoke to gave me some reassuring feedback and some useful advice. She said first of all I was capable of doing the job with the support available. She also said I came across as patient and sensitive, a real team player, and advised me that I needed to sell myself more, as I didn't mention everything I had put on my application form. She told me that there's another position coming up soon, one that involves supporting a child in a mainstream school and with my permission she's going to give my name and number to the headmaster.
You may also be interested to hear that B got the job (no surprises there). I'm not too disheartened. It was the result I was expecting. I am applying for two more positions. My prospective landlady gave me a few more suggestions, and I acquired plenty of new routes from the job fair yesterday. So it isn't the end of the world. It was my first formal interview and I have some idea of how to prepare for the next one.
God has something perfect for me, and maybe I will find out what that is soon. In the mean time I will meditate on Jeremiah 29.11: 'For I know the plans I have for you,' declares the Lord, 'plans to prosper you and not to harm you, plans to give you hope and a future'.