The 2 best interviews I ever had....the first was when I was asked if I was interested in a teaching post. I was, but was unable to attend the interviews. I was phoned later on the interview day and was told that I had done very well in the interview, but could I come in and fill in the application form! The second was when I was offered a job over the phone while I was sitting on the loo! You could say I was in the right place at the right time!
To be honest, I hated interviews, but for a lot of the time I did supply teaching, so I was a known quantity and I knew where I would be happy. But I did go for jobs I felt I could do and would enjoy, even if I thought I wasn't qualified or experienced enough. Let them make up their minds, rather than make it up for them. Keep looking, then you will find the opportunities.