Loads of luck today, sorry didn't see this yesterday for you.
I got made redundant from very good job working as PR Manager for large high street bank two years ago. My world caved in, but once I'd started to enjoy the "being a mum" career, I realised there was a whole new world out there

However, have to admit that after 18 months the novelty was beginning to wear off - I'm not a regular coffee morning type, let's do lunch brigade, don't do dressmaking, curtain making that sort of thing and the few little private PR jobs I'd done for a few buddies were not sufficient to keep me occupied, so sat down and had a really good think about what I wanted in life.
Easy - a "no pressure", part-time, school holidays off type of job. This meant counting PR out because I'd have to work full time again and most probably commute to either Southampton, Winchester or, even worse, back to London
Then I saw an advert for an Admin Asst for local school in the paper. 5 mornings and week, term time only. Brilliant. So I went for it. And got it (still don't know how!). I am extremely happy. Of course the money is no-where like I used to earn, but I've learnt how to "budget" for lots of things and we are lucky to still have a nice lifestyle.
Like yours, my DH has been made redundant - Darryl's been made redundant four times over the past 10 years and we've decided that each time it has been for the better. He's an Account Manager and the sales industry is volatile at the best of times. He knows the signs now and moves on when he feels the time is right. But it is such a huge worry when it happens and has never had any redundancy payouts worth anything.
I too was terrified at the prospect of an interview. My god, it had been over 15 years since I'd had a new job interview. But went along - in my trouser suit

- and had a great time. My philosophy (and I suppose I was lucky in that there was no pressure as such since I didn't HAVE to get the job, although I did want to) was to show them what they would be missing if they didn't pick me, but to also be totally honest. My professional qualifications were a bit of a tumbling block, as I knew they'd be - after all, why would someone who had had a very senior position with a fleet of their own staff/secretary, suddenly want to be a part-time school secretary? But they did appreciate my reasons (work/family balance) and what I could offer them.
Don't forget, you have something they want, or else they wouldn't be interviewing you.
Loads and loads of good luck, and if it's what you really want I hope it all goes well.