30 you say? Well that's hardly over the hill now is it?
I have to say there are some pretty poor responses in the comments, many are very discouraging. Don't listen to them. Let's look at some factors:
- There's an IT skills shortage, worldwide.
- As a teacher you must have a degree so you've a proven ability to learn.
- As a teacher you've proven that you can train people, and speak to groups confidently.
- As a non-geek originally, people should be able to relate to you better than your average Slashdot troll (sorry, couldn't resist)!
- You don't need to learn to program to be a sysadmin. Scripting skills would be a big advantage though.
- Tech is a wide and varied area, you have lots of options for entry, from going back to school through to starting with a small business and doing helpdesk stuff to work up to sysadmin duties.
- It will take time and effort (be prepared to 'live' IT for several years). But I've seen other teachers do it (I work as an IT Manager at a school).
Finally, like I said, you can do it, you're by no means over the hill. I wonder if a side-step might be a best first move. Buddy up with some companies that do tech in schools at the same time as doing some out of hours study and you might find you can move over as an educational tech. consultant or a techie with a welcome educational background, and then use that as the foot in the door.
Anyway, best of luck. Like I say, I've certainly seen teachers do this, I know a former school teacher who works for Microsoft.
My final words of advice.... prepare to give up the long holidays, forever! ;)